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Morya AK, Ramesh PV, Nishant P, Kaur K, Gurnani B, Heda A, Salodia S. Diabetic retinopathy: A review on its pathophysiology and novel treatment modalities. World J Methodol 2024; 14:95881. [DOI: 10.5662/wjm.v14.i4.95881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 05/28/2024] [Accepted: 07/10/2024] [Indexed: 07/26/2024] Open
Abstract
Diabetes mellitus (DM) is a chronic metabolic non-communicable disease with the ability to cause serious microvascular and macrovascular complications throughout the body, including in the eye. Diabetic retinopathy (DR), present in one-third of patients with diabetes, is a vision-threatening complication caused by uncontrolled diabetes, which greatly affects the retinal blood vessels and the light-sensitive inner retina, eventually leading to blindness. Several epidemiological studies elucidate that DR can vary by age of onset, duration, types of diabetes, and ethnicity. Recent studies show that the pathogenesis of diabetic retinopathy has spread its roots beyond merely being the result of hyperglycemia. The complexity of its etiopathology and diagnosis makes therapeutic intervention challenging. This review throws light on the pathological processes behind DR, the cascade of events that follow it, as well as the available and emerging treatment options.
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Affiliation(s)
- Arvind Kumar Morya
- Head of the Department, Department of Ophthalmology, All India Institute of Medical Sciences, Hyderabad 508126, Telangana, India
| | - Prasanna Venkatesh Ramesh
- Glaucoma Medical Officer, Department of Glaucoma and Research, Mahathma Eye Hospital Private Limited, Trichy 620017, Tamil Nadu, India
| | - Prateek Nishant
- Department of Ophthalmology, ESIC Medical College, Patna 801103, Bihar, India
| | - Kirandeep Kaur
- Department of Pediatric Ophthalmology and Strabismus, Gomabai Netralaya and Research Centre, Neemuch 458441, Madhya Pradesh, India
| | - Bharat Gurnani
- Cornea and Refractive Services, Gomabai Netralaya and Research Centre, Neemuch 458441, Madhya Pradesh, India
| | - Aarti Heda
- Department of Ophthalmology, National Institute of Ophthalmology, Pune 411000, Maharashtra, India
| | - Sarika Salodia
- Global Medical Safety, Lundbeck, Singapore 569933, Singapore, Singapore
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Bejarano E, Domenech-Bendaña A, Avila-Portillo N, Rowan S, Edirisinghe S, Taylor A. Glycative stress as a cause of macular degeneration. Prog Retin Eye Res 2024; 101:101260. [PMID: 38521386 DOI: 10.1016/j.preteyeres.2024.101260] [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: 01/05/2024] [Revised: 03/08/2024] [Accepted: 03/11/2024] [Indexed: 03/25/2024]
Abstract
People are living longer and rates of age-related diseases such as age-related macular degeneration (AMD) are accelerating, placing enormous burdens on patients and health care systems. The quality of carbohydrate foods consumed by an individual impacts health. The glycemic index (GI) is a kinetic measure of the rate at which glucose arrives in the blood stream after consuming various carbohydrates. Consuming diets that favor slowly digested carbohydrates releases sugar into the bloodstream gradually after consuming a meal (low glycemic index). This is associated with reduced risk for major age-related diseases including AMD, cardiovascular disease, and diabetes. In comparison, consuming the same amounts of different carbohydrates in higher GI diets, releases glucose into the blood rapidly, causing glycative stress as well as accumulation of advanced glycation end products (AGEs). Such AGEs are cytotoxic by virtue of their forming abnormal proteins and protein aggregates, as well as inhibiting proteolytic and other protective pathways that might otherwise selectively recognize and remove toxic species. Using in vitro and animal models of glycative stress, we observed that consuming higher GI diets perturbs metabolism and the microbiome, resulting in a shift to more lipid-rich metabolomic profiles. Interactions between aging, diet, eye phenotypes and physiology were observed. A large body of laboratory animal and human clinical epidemiologic data indicates that consuming lower GI diets, or lower glycemia diets, is protective against features of early AMD (AMDf) in mice and AMD prevalence or AMD progression in humans. Drugs may be optimized to diminish the ravages of higher glycemic diets. Human trials are indicated to determine if AMD progression can be retarded using lower GI diets. Here we summarized the current knowledge regarding the pathological role of glycative stress in retinal dysfunction and how dietary strategies might diminish retinal disease.
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Affiliation(s)
- Eloy Bejarano
- Department of Biomedical Sciences, School of Health Sciences and Veterinary School, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain
| | - Alicia Domenech-Bendaña
- Department of Biomedical Sciences, School of Health Sciences and Veterinary School, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain
| | | | - Sheldon Rowan
- JM USDA Human Nutrition Research Center on Aging at Tufts University, United States
| | - Sachini Edirisinghe
- Tufts University Friedman School of Nutrition Science and Policy, United States
| | - Allen Taylor
- Tufts University Friedman School of Nutrition Science and Policy, United States.
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3
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Li C, Wu C, Li F, Xu W, Zhang X, Huang Y, Xia D. Targeting Neutrophil Extracellular Traps in Gouty Arthritis: Insights into Pathogenesis and Therapeutic Potential. J Inflamm Res 2024; 17:1735-1763. [PMID: 38523684 PMCID: PMC10960513 DOI: 10.2147/jir.s460333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/07/2024] [Indexed: 03/26/2024] Open
Abstract
Gouty arthritis (GA) is an immune-mediated disorder characterized by severe inflammation due to the deposition of monosodium urate (MSU) crystals in the joints. The pathophysiological mechanisms of GA are not yet fully understood, and therefore, the identification of effective therapeutic targets is of paramount importance. Neutrophil extracellular traps (NETs), an intricate structure of DNA scaffold, encompassing myeloperoxidase, histones, and elastases - have gained significant attention as a prospective therapeutic target for gouty arthritis, due to their innate antimicrobial and immunomodulatory properties. Hence, exploring the therapeutic potential of NETs in gouty arthritis remains an enticing avenue for further investigation. During the process of gouty arthritis, the formation of NETs triggers the release of inflammatory cytokines, thereby contributing to the inflammatory response, while MSU crystals and cytokines are sequestered and degraded by the aggregation of NETs. Here, we provide a concise summary of the inflammatory processes underlying the initiation and resolution of gouty arthritis mediated by NETs. Furthermore, this review presents an overview of the current pharmacological approaches for treating gouty arthritis and summarizes the potential of natural and synthetic product-based inhibitors that target NET formation as novel therapeutic options, alongside elucidating the intrinsic challenges of these inhibitors in NETs research. Lastly, the limitations of HL-60 cell as a suitable substitute of neutrophils in NETs research are summarized and discussed. Series of recommendations are provided, strategically oriented towards guiding future investigations to effectively address these concerns. These findings will contribute to an enhanced comprehension of the interplay between NETs and GA, facilitating the proposition of innovative therapeutic strategies and novel approaches for the management of GA.
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Affiliation(s)
- Cantao Li
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
| | - Chenxi Wu
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
| | - Fenfen Li
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
| | - Wenjing Xu
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
| | - Xiaoxi Zhang
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
| | - Yan Huang
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
| | - Daozong Xia
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, People’s Republic of China
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Pereira M, Liang J, Edwards-Hicks J, Meadows AM, Hinz C, Liggi S, Hepprich M, Mudry JM, Han K, Griffin JL, Fraser I, Sack MN, Hess C, Bryant CE. Arachidonic acid inhibition of the NLRP3 inflammasome is a mechanism to explain the anti-inflammatory effects of fasting. Cell Rep 2024; 43:113700. [PMID: 38265935 PMCID: PMC10940735 DOI: 10.1016/j.celrep.2024.113700] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 11/27/2023] [Accepted: 01/05/2024] [Indexed: 01/26/2024] Open
Abstract
Elevated interleukin (IL)-1β levels, NLRP3 inflammasome activity, and systemic inflammation are hallmarks of chronic metabolic inflammatory syndromes, but the mechanistic basis for this is unclear. Here, we show that levels of plasma IL-1β are lower in fasting compared to fed subjects, while the lipid arachidonic acid (AA) is elevated. Lipid profiling of NLRP3-stimulated mouse macrophages shows enhanced AA production and an NLRP3-dependent eicosanoid signature. Inhibition of cyclooxygenase by nonsteroidal anti-inflammatory drugs decreases eicosanoid, but not AA, production. It also reduces both IL-1β and IL-18 production in response to NLRP3 activation. AA inhibits NLRP3 inflammasome activity in human and mouse macrophages. Mechanistically, AA inhibits phospholipase C activity to reduce JNK1 stimulation and hence NLRP3 activity. These data show that AA is an important physiological regulator of the NLRP3 inflammasome and explains why fasting reduces systemic inflammation and also suggests a mechanism to explain how nonsteroidal anti-inflammatory drugs work.
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Affiliation(s)
- Milton Pereira
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Jonathan Liang
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK; Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Disease (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Joy Edwards-Hicks
- The Cambridge Institute of Therapeutic Immunology and Infectious Disease (CITIID), University of Cambridge, Cambridge, UK
| | - Allison M Meadows
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung and Blood Institute (NHLBI), NIH, Bethesda, MD, USA; Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Christine Hinz
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Sonia Liggi
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | | | | | - Kim Han
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung and Blood Institute (NHLBI), NIH, Bethesda, MD, USA
| | - Julian L Griffin
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Iain Fraser
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Disease (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Michael N Sack
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung and Blood Institute (NHLBI), NIH, Bethesda, MD, USA
| | - Christoph Hess
- The Cambridge Institute of Therapeutic Immunology and Infectious Disease (CITIID), University of Cambridge, Cambridge, UK
| | - Clare E Bryant
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK; Department of Medicine, University of Cambridge, Cambridge, UK.
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Tang S, An X, Sun W, Zhang Y, Yang C, Kang X, Sun Y, Jiang L, Zhao X, Gao Q, Ji H, Lian F. Parallelism and non-parallelism in diabetic nephropathy and diabetic retinopathy. Front Endocrinol (Lausanne) 2024; 15:1336123. [PMID: 38419958 PMCID: PMC10899692 DOI: 10.3389/fendo.2024.1336123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 01/23/2024] [Indexed: 03/02/2024] Open
Abstract
Diabetic nephropathy (DN) and diabetic retinopathy (DR), as microvascular complications of diabetes mellitus, are currently the leading causes of end-stage renal disease (ESRD) and blindness, respectively, in the adult working population, and they are major public health problems with social and economic burdens. The parallelism between the two in the process of occurrence and development manifests in the high overlap of disease-causing risk factors and pathogenesis, high rates of comorbidity, mutually predictive effects, and partial concordance in the clinical use of medications. However, since the two organs, the eye and the kidney, have their unique internal environment and physiological processes, each with specific influencing molecules, and the target organs have non-parallelism due to different pathological changes and responses to various influencing factors, this article provides an overview of the parallelism and non-parallelism between DN and DR to further recognize the commonalities and differences between the two diseases and provide references for early diagnosis, clinical guidance on the use of medication, and the development of new drugs.
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Affiliation(s)
- Shanshan Tang
- College of Traditional Chinese Medicine, Changchun University of Traditional Chinese Medicine, Changchun, China
| | - Xuedong An
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Wenjie Sun
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Yuehong Zhang
- Fangshan Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Cunqing Yang
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiaomin Kang
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Yuting Sun
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Linlin Jiang
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Xuefei Zhao
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Qing Gao
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Hangyu Ji
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Fengmei Lian
- Guang’an Men Hospital of China Academy of Chinese Medical Sciences, Beijing, China
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Pan D, Xu L, Chen P, Miao L, Tian Y, Shi D, Guo M. Panax Quinquefolium Saponins enhances angiogenesis in rats with diabetes and myocardial infarction. JOURNAL OF ETHNOPHARMACOLOGY 2024; 319:117252. [PMID: 37777023 DOI: 10.1016/j.jep.2023.117252] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/17/2023] [Accepted: 09/28/2023] [Indexed: 10/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Xi Yang Shen (Panax quinquefolium L.) was originally recorded in "Ben Cao Cong Xin" edited by Wu Yiluo during the Qing Dynasty. Panax Quinquefolium Saponins (PQS) is the main component derived from Panax quinquefolium L, and has been wildly used in the treatment of coronary heart disease. AIM OF THE STUDY This study aims to explore the potential role and underlying mechanisms of PQS in promoting angiogenesis in rats with diabetes and myocardial infarction. MATERIALS AND METHODS Echocardiograms were used to assess cardiac function, while the heart weight to tibia length ratio was calculated to determine cardiac hypertrophy. Hematoxylin and eosin, periodic acid-Schiff and Masson's trichrome staining were used to examine cardiac morphology, myocyte diameter, and myocardial fibrosis. Immunofluorescence staining was employed to evaluate arteriolar density. The transcriptomes were analyzed and bioinformatic analyses were conducted to predict the potential angiogenesis-promoting mechanism of PQS. In addition, RT-PCR and western blotting was utilized to examine the expression of genes and proteins influenced by PQS. RESULTS PQS improved blood glucose, ameliorated cardiac function, reduced cardiac hypertrophy, and enhanced myocardial morphology in diabetic rats with myocardial infarction. PQS was also found to decrease myocyte diameter, curtail myocardial fibrosis, and increase arteriolar density. However, the effects of PQS were abolished following the deletion of protein kinase C δ (PKCδ). Molecular docking predicted strong interactions between the major blood components of PQS and PKCδ. Transcriptomic and bioinformatic analyses indicated that PQS may bolster angiogenesis by activating the VEGF/PI3K-Akt/eNOS pathway in rats with diabetes and myocardial infarction. Finally, the study demonstrated that PQS could inhibit the expression of PKCδ and stimulate the activation of the VEGF/PI3K-Akt/eNOS pathway. CONCLUSIONS PQS improves blood glucose, enhances cardiac function, mitigates cardiac damage, and boosts arteriolar density. The angiogenic impact of PQS appears to be, at least partially, due to its modulation of the PKCδ-mediated VEGF/PI3K-Akt/eNOS signaling pathway in rats with diabetes and myocardial infarction.
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Affiliation(s)
- Deng Pan
- Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China; Graduate School of Beijing University of Chinese Medicine, Beijing, China
| | - Lin Xu
- Gynecological Department of Traditional Chinese Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Pengfei Chen
- Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Lina Miao
- Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Yi Tian
- Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, China
| | - Dazhuo Shi
- Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China.
| | - Ming Guo
- Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China.
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Yuan L, Verhoeven A, Blomberg N, van Eyk HJ, Bizino MB, Rensen PCN, Jazet IM, Lamb HJ, Rabelink TJ, Giera M, van den Berg BM. Ethnic Disparities in Lipid Metabolism and Clinical Outcomes between Dutch South Asians and Dutch White Caucasians with Type 2 Diabetes Mellitus. Metabolites 2024; 14:33. [PMID: 38248836 PMCID: PMC10819672 DOI: 10.3390/metabo14010033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/26/2023] [Accepted: 12/30/2023] [Indexed: 01/23/2024] Open
Abstract
Type 2 diabetes mellitus (T2DM) poses a higher risk for complications in South Asian individuals compared to other ethnic groups. To shed light on potential mediating factors, we investigated lipidomic changes in plasma of Dutch South Asians (DSA) and Dutch white Caucasians (DwC) with and without T2DM and explore their associations with clinical features. Using a targeted quantitative lipidomics platform, monitoring over 1000 lipids across 17 classes, along with 1H NMR based lipoprotein analysis, we studied 51 healthy participants (21 DSA, 30 DwC) and 92 T2DM patients (47 DSA, 45 DwC) from the MAGNetic resonance Assessment of VICTOza efficacy in the Regression of cardiovascular dysfunction in type 2 dIAbetes mellitus (MAGNA VICTORIA) study. This comprehensive mapping of the circulating lipidome allowed us to identify relevant lipid modules through unbiased weighted correlation network analysis, as well as disease and ethnicity related key mediatory lipids. Significant differences in lipidomic profiles, encompassing various lipid classes and species, were observed between T2DM patients and healthy controls in both the DSA and DwC populations. Our analyses revealed that healthy DSA, but not DwC, controls already exhibited a lipid profile prone to develop T2DM. Particularly, in DSA-T2DM patients, specific lipid changes correlated with clinical features, particularly diacylglycerols (DGs), showing significant associations with glycemic control and renal function. Our findings highlight an ethnic distinction in lipid modules influencing clinical outcomes in renal health. We discover distinctive ethnic disparities of the circulating lipidome and identify ethnicity-specific lipid markers. Jointly, our discoveries show great potential as personalized biomarkers for the assessment of glycemic control and renal function in DSA-T2DM individuals.
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Affiliation(s)
- Lushun Yuan
- Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (L.Y.); (P.C.N.R.); (T.J.R.)
- Department of Internal Medicine, Division of Nephrology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Aswin Verhoeven
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (A.V.); (N.B.); (M.G.)
| | - Niek Blomberg
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (A.V.); (N.B.); (M.G.)
| | - Huub J. van Eyk
- Department of Internal Medicine, Division of Endocrinology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (H.J.v.E.); (I.M.J.)
| | - Maurice B. Bizino
- Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (M.B.B.); (H.J.L.)
| | - Patrick C. N. Rensen
- Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (L.Y.); (P.C.N.R.); (T.J.R.)
- Department of Internal Medicine, Division of Endocrinology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (H.J.v.E.); (I.M.J.)
| | - Ingrid M. Jazet
- Department of Internal Medicine, Division of Endocrinology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (H.J.v.E.); (I.M.J.)
| | - Hildo J. Lamb
- Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (M.B.B.); (H.J.L.)
| | - Ton J. Rabelink
- Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (L.Y.); (P.C.N.R.); (T.J.R.)
- Department of Internal Medicine, Division of Nephrology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Martin Giera
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (A.V.); (N.B.); (M.G.)
| | - Bernard M. van den Berg
- Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (L.Y.); (P.C.N.R.); (T.J.R.)
- Department of Internal Medicine, Division of Nephrology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
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Sun WJ, An XD, Zhang YH, Zhao XF, Sun YT, Yang CQ, Kang XM, Jiang LL, Ji HY, Lian FM. The ideal treatment timing for diabetic retinopathy: the molecular pathological mechanisms underlying early-stage diabetic retinopathy are a matter of concern. Front Endocrinol (Lausanne) 2023; 14:1270145. [PMID: 38027131 PMCID: PMC10680169 DOI: 10.3389/fendo.2023.1270145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
Diabetic retinopathy (DR) is a prevalent complication of diabetes, significantly impacting patients' quality of life due to vision loss. No pharmacological therapies are currently approved for DR, excepted the drugs to treat diabetic macular edema such as the anti-VEGF agents or steroids administered by intraocular route. Advancements in research have highlighted the crucial role of early intervention in DR for halting or delaying disease progression. This holds immense significance in enhancing patients' quality of life and alleviating the societal burden associated with medical care costs. The non-proliferative stage represents the early phase of DR. In comparison to the proliferative stage, pathological changes primarily manifest as microangiomas and hemorrhages, while at the cellular level, there is a loss of pericytes, neuronal cell death, and disruption of components and functionality within the retinal neuronal vascular unit encompassing pericytes and neurons. Both neurodegenerative and microvascular abnormalities manifest in the early stages of DR. Therefore, our focus lies on the non-proliferative stage of DR and we have initially summarized the mechanisms involved in its development, including pathways such as polyols, that revolve around the pathological changes occurring during this early stage. We also integrate cutting-edge mechanisms, including leukocyte adhesion, neutrophil extracellular traps, multiple RNA regulation, microorganisms, cell death (ferroptosis and pyroptosis), and other related mechanisms. The current status of drug therapy for early-stage DR is also discussed to provide insights for the development of pharmaceutical interventions targeting the early treatment of DR.
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Affiliation(s)
- Wen-Jie Sun
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Xue-Dong An
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Yue-Hong Zhang
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Xue-Fei Zhao
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Yu-Ting Sun
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Cun-Qing Yang
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiao-Min Kang
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Beijing University of Chinese Medicine, Beijing, China
| | - Lin-Lin Jiang
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Beijing University of Chinese Medicine, Beijing, China
| | - Hang-Yu Ji
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Feng-Mei Lian
- Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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Davis SE, Cirincione AB, Jimenez-Torres AC, Zhu J. The Impact of Neurotransmitters on the Neurobiology of Neurodegenerative Diseases. Int J Mol Sci 2023; 24:15340. [PMID: 37895020 PMCID: PMC10607327 DOI: 10.3390/ijms242015340] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Neurodegenerative diseases affect millions of people worldwide. Neurodegenerative diseases result from progressive damage to nerve cells in the brain or peripheral nervous system connections that are essential for cognition, coordination, strength, sensation, and mobility. Dysfunction of these brain and nerve functions is associated with Alzheimer's disease, Parkinson's disease, Huntington's disease, Amyotrophic lateral sclerosis, and motor neuron disease. In addition to these, 50% of people living with HIV develop a spectrum of cognitive, motor, and/or mood problems collectively referred to as HIV-Associated Neurocognitive Disorders (HAND) despite the widespread use of a combination of antiretroviral therapies. Neuroinflammation and neurotransmitter systems have a pathological correlation and play a critical role in developing neurodegenerative diseases. Each of these diseases has a unique pattern of dysregulation of the neurotransmitter system, which has been attributed to different forms of cell-specific neuronal loss. In this review, we will focus on a discussion of the regulation of dopaminergic and cholinergic systems, which are more commonly disturbed in neurodegenerative disorders. Additionally, we will provide evidence for the hypothesis that disturbances in neurotransmission contribute to the neuronal loss observed in neurodegenerative disorders. Further, we will highlight the critical role of dopamine as a mediator of neuronal injury and loss in the context of NeuroHIV. This review will highlight the need to further investigate neurotransmission systems for their role in the etiology of neurodegenerative disorders.
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Affiliation(s)
| | | | | | - Jun Zhu
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, 715 Sumter Street, Columbia, SC 29208, USA; (S.E.D.); (A.B.C.); (A.C.J.-T.)
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10
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Kim J. The pathophysiology of diabetic foot: a narrative review. JOURNAL OF YEUNGNAM MEDICAL SCIENCE 2023; 40:328-334. [PMID: 37797951 PMCID: PMC10626291 DOI: 10.12701/jyms.2023.00731] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 10/07/2023]
Abstract
An aging population and changes in dietary habits have increased the incidence of diabetes, resulting in complications such as diabetic foot ulcers (DFUs). DFUs can lead to serious disabilities, substantial reductions in patient quality of life, and high financial costs for society. By understanding the etiology and pathophysiology of DFUs, their occurrence can be prevented and managed more effectively. The pathophysiology of DFUs involves metabolic dysfunction, diabetic immunopathy, diabetic neuropathy, and angiopathy. The processes by which hyperglycemia causes peripheral nerve damage are related to adenosine triphosphate deficiency, the polyol pathway, oxidative stress, protein kinase C activity, and proinflammatory processes. In the context of hyperglycemia, the suppression of endothelial nitric oxide production leads to microcirculation atherosclerosis, heightened inflammation, and abnormal intimal growth. Diabetic neuropathy involves sensory, motor, and autonomic neuropathies. The interaction between these neuropathies forms a callus that leads to subcutaneous hemorrhage and skin ulcers. Hyperglycemia causes peripheral vascular changes that result in endothelial cell dysfunction and decreased vasodilator secretion, leading to ischemia. The interplay among these four preceding pathophysiological factors fosters the development and progression of infections in individuals with diabetes. Charcot neuroarthropathy is a chronic and progressive degenerative arthropathy characterized by heightened blood flow, increased calcium dissolution, and repeated minor trauma to insensate joints. Directly and comprehensively addressing the pathogenesis of DFUs could pave the way for the development of innovative treatment approaches with the potential to avoid the most serious complications, including major amputations.
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Affiliation(s)
- Jiyoun Kim
- Department of Orthopaedic Surgery, Kosin University College of Medicine, Busan, Korea
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11
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Tyagi K, Roy A, Mandal S. Pharmacological inhibition of protein kinase D suppresses epithelial ovarian cancer via MAPK/ERK1/2/Runx2 signalling axis. Cell Signal 2023; 110:110849. [PMID: 37562720 DOI: 10.1016/j.cellsig.2023.110849] [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: 06/09/2023] [Revised: 08/04/2023] [Accepted: 08/06/2023] [Indexed: 08/12/2023]
Abstract
Epithelial ovarian cancer (EOC) is the most lethal gynaecological malignancy with poor prognosis and dismal patient survival. Although protein kinase D (PKD) isoforms, especially PKD2 and PKD3 are critical for many cellular and physiological functions involved in carcinogenesis including cell proliferation and angiogenesis, their role in human EOC remains unknown. Towards the goal to identify novel prognostic biomarker and therapeutic interventions against EOC, this study aimed to elucidate the molecular roles of PKD2, PKD3 and highly selective, pan-PKD inhibitor CRT0066101 in this lethal pathology. Our results indicated that inactivation of PKD2 and PKD3 by 1 μM CRT0066101 suppressed EOC cell proliferation, colony formation, cell migration and invasion. Moreover, CRT0066101 induced apoptosis and inhibited cell cycle at G2-M phase in EOC cells. Genetic knockdown of PKD2 and PKD3 confirmed the anti-carcinogenic effects of CRT0066101 against EOC. The anti-cancer phenotype of EOC cells resulted from CRT0066101-mediated PKD2 and PKD3 inactivation or genetic depletion was, in part, mediated by transcription factor Runx2 as abrogation of PKD2 and PKD3 caused downregulation of Runx2 and its downstream target genes including osteopontin, focal adhesion kinase and ERK1/2. Moreover, overexpression of a constitutively active PKD2 augmented the expression levels of phosphor-ERK1/2T202/Y204, Runx2 and its downstream targets. Mechanistically, PKD2 and PKD3 positively regulated Runx2 via MAPK/ERK1/2 pathway and promoted EOC. Taken together, our results indicated that PKD2/3/ERK1/2/Runx2 signalling axis might be a novel drug target against EOC and CRT0066101 could be developed as a promising therapeutic choice against this lethal pathology.
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Affiliation(s)
- Komal Tyagi
- Amity Institute of Molecular Medicine & Stem Cell Research, Amity University, Sector 125, Noida, Uttar Pradesh 201303, India
| | - Adhiraj Roy
- Amity Institute of Molecular Medicine & Stem Cell Research, Amity University, Sector 125, Noida, Uttar Pradesh 201303, India.
| | - Supratim Mandal
- Department of Microbiology, University of Kalyani, Kalyani, Nadia, West Bengal 741235, India
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12
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Jiang Y, He Y, Liu S, Li G, Chen D, Deng W, Li P, Zhang Y, Wu J, Li J, Wang L, Lin J, Wang H, Kong S, Shi G. Gαq-PKD/PKCμ signal regulating the nuclear export of HDAC5 to induce the IκB expression and limit the NF-κB-mediated inflammatory response essential for early pregnancy. eLife 2023; 12:e83083. [PMID: 37498654 PMCID: PMC10374280 DOI: 10.7554/elife.83083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 06/28/2023] [Indexed: 07/28/2023] Open
Abstract
Decidualization, denoting the transformation of endometrial stromal cells into specialized decidual cells, is a prerequisite for normal embryo implantation and a successful pregnancy in human. Here, we demonstrated that knockout of Gαq lead to an aberrantly enhanced inflammatory state during decidualization. Furthermore, we showed that deficiency of Gαq resulted in over-activation of nuclear factor (NF)-κB signaling, due to the decreased expression of NFκBIA, which encode the IκB protein and is the negative regulator for NF-κB. Mechanistically, Gαq deficiency decreased the Protein kinase D (PKD, also called PKCμ) phosphorylation levels, leading to attenuated HDAC5 phosphorylation and thus its nuclear export. Aberrantly high level of nuclear HDAC5 retarded histone acetylation to inhibit the induced NFκBIA transcription during decidualization. Consistently, pharmacological activation of the PKD/PKCμ or inhibition of the HDAC5 restored the inflammatory state and proper decidual response. Finally, we disclosed that over-active inflammatory state in Gαq-deficient decidua deferred the blastocyst hatching and adhesion in vitro, and the decidual expression of Gαq was significantly lower in women with recurrent pregnancy loss compared with normal pregnancy. In brief, we showed here that Gαq as a key regulator of the inflammatory cytokine's expression and decidual homeostasis in response to differentiation cues, which is required for successful implantation and early pregnancy.
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Affiliation(s)
- Yufei Jiang
- Xiamen Key Laboratory of Reproduction and Genetics, Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Yan He
- Xiamen Key Library of Rheumatology and Clinical Immunology, Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Songting Liu
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Gaizhen Li
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Dunjin Chen
- Department of Pathology, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Wenbo Deng
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Ping Li
- Xiamen Key Laboratory of Reproduction and Genetics, Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Ying Zhang
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Jinxiang Wu
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Jianing Li
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Longmei Wang
- Xiamen Key Laboratory of Reproduction and Genetics, Department of Reproductive Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Jiajing Lin
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Haibin Wang
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Shuangbo Kong
- Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Guixiu Shi
- Xiamen Key Library of Rheumatology and Clinical Immunology, Department of Rheumatology and Clinical Immunology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
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13
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Xu Y, Hu Q, Wei Z, Ou Y, Cao Y, Zhou H, Wang M, Yu K, Liang B. Advanced polymer hydrogels that promote diabetic ulcer healing: mechanisms, classifications, and medical applications. Biomater Res 2023; 27:36. [PMID: 37101201 PMCID: PMC10134570 DOI: 10.1186/s40824-023-00379-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/14/2023] [Indexed: 04/28/2023] Open
Abstract
Diabetic ulcers (DUs) are one of the most serious complications of diabetes mellitus. The application of a functional dressing is a crucial step in DU treatment and is associated with the patient's recovery and prognosis. However, traditional dressings with a simple structure and a single function cannot meet clinical requirements. Therefore, researchers have turned their attention to advanced polymer dressings and hydrogels to solve the therapeutic bottleneck of DU treatment. Hydrogels are a class of gels with a three-dimensional network structure that have good moisturizing properties and permeability and promote autolytic debridement and material exchange. Moreover, hydrogels mimic the natural environment of the extracellular matrix, providing suitable surroundings for cell proliferation. Thus, hydrogels with different mechanical strengths and biological properties have been extensively explored as DU dressing platforms. In this review, we define different types of hydrogels and elaborate the mechanisms by which they repair DUs. Moreover, we summarize the pathological process of DUs and review various additives used for their treatment. Finally, we examine the limitations and obstacles that exist in the development of the clinically relevant applications of these appealing technologies. This review defines different types of hydrogels and carefully elaborate the mechanisms by which they repair diabetic ulcers (DUs), summarizes the pathological process of DUs, and reviews various bioactivators used for their treatment.
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Affiliation(s)
- Yamei Xu
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
| | - Qiyuan Hu
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
| | - Zongyun Wei
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
| | - Yi Ou
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
| | - Youde Cao
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Department of Pathology, the First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuzhong Distinct, Chongqing, 400042, P.R. China
| | - Hang Zhou
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
| | - Mengna Wang
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China
| | - Kexiao Yu
- Department of Orthopedics, Chongqing Traditional Chinese Medicine Hospital, No. 6 Panxi Seventh Branch Road, Jiangbei District, Chongqing, 400021, P.R. China.
- Institute of Ultrasound Imaging of Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China.
| | - Bing Liang
- Department of Pathology, College of Basic Medicine, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China.
- Molecular Medicine Diagnostic and Testing Center, Chongqing Medical University, 1 Yixueyuan Road, Yuzhong Distinct, Chongqing, 400016, P.R. China.
- Department of Pathology, the First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuzhong Distinct, Chongqing, 400042, P.R. China.
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14
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Burciaga SD, Saavedra F, Fischer L, Johnstone K, Jensen ED. Protein kinase D3 conditional knockout impairs osteoclast formation and increases trabecular bone volume in male mice. Bone 2023; 172:116759. [PMID: 37044359 DOI: 10.1016/j.bone.2023.116759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/15/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023]
Abstract
Studies using kinase inhibitors have shown that the protein kinase D (PRKD) family of serine/threonine kinases are required for formation and function of osteoclasts in culture. However, the involvement of individual protein kinase D genes and their in vivo significance to skeletal dynamics remains unclear. In the current study we present data indicating that protein kinase D3 is the primary form of PRKD expressed in osteoclasts. We hypothesized that loss of PRKD3 would impair osteoclast formation, thereby decreasing bone resorption and increasing bone mass. Conditional knockout (cKO) of Prkd3 using a murine Cre/Lox system driven by cFms-Cre revealed that its loss in osteoclast-lineage cells reduced osteoclast differentiation and resorptive function in culture. Examination of the Prkd3 cKO mice showed that bone parameters were unaffected in the femur at 4 weeks of age, but consistent with our hypothesis, Prkd3 conditional knockout resulted in 18 % increased trabecular bone mass in male mice at 12 weeks and a similar increase at 6 months. These effects were not observed in female mice. As a further test of our hypothesis, we asked if Prkd3 cKO could protect against bone loss in a ligature-induced periodontal disease model but did not see any reduction in bone destruction in this system. Together, our data indicate that PRKD3 promotes osteoclastogenesis both in vitro and in vivo.
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Affiliation(s)
- Samuel D Burciaga
- Department of Diagnostic & Biological Sciences, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA
| | - Flavia Saavedra
- Department of Diagnostic & Biological Sciences, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA
| | - Lori Fischer
- Department of Diagnostic & Biological Sciences, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA
| | - Karen Johnstone
- Department of Diagnostic & Biological Sciences, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA
| | - Eric D Jensen
- Department of Diagnostic & Biological Sciences, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA.
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15
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Legay C, Doublier S, Babajko S, Ricort JM. Protein kinase D1 overexpression potentiates epidermal growth factor signaling pathway in MCF-7 cells. Mol Biol Rep 2023; 50:3641-3651. [PMID: 36800056 DOI: 10.1007/s11033-023-08300-z] [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: 07/20/2022] [Accepted: 01/20/2023] [Indexed: 02/18/2023]
Abstract
BACKGROUND Protein kinase D1, PKD1, is a serine-threonine kinase implicated in cell proliferation, migration, invasion, and/or apoptosis and its activation by several growth factors sets this enzyme as a key regulator of tumorigenesis and tumor progression. Despite many studies, its role in the regulation of intracellular signaling pathways remains widely disparate and needs to be clarified. METHODS AND RESULTS By using human breast cancer cells MCF-7, overexpressing or not PKD1, we demonstrated that PKD1 expression level modulated the tumor growth-promoting epidermal growth factor (EGF) signaling pathway. We also showed that EGF acutely stimulated PKD1 phosphorylation with similar time courses both in control and PKD1-overexpressing cells. However, PKD1 overexpression specifically and markedly increased EGF-induced phosphorylation of Akt (onto T308 and S473 residues) and extracellular-regulated protein kinase (ERK1/2). Finally, pharmacological inhibition of PKD1 activity or lowering its expression level using specific siRNAs drastically reduced EGF-stimulated Akt and ERK phosphorylation in PKD1overexpressing cells, but not in control cells. CONCLUSIONS Overall, these results identified the level of PKD1 expression as a key determinant in the regulation of the EGF signaling pathway highlighting its crucial role in a tumorigenic setting.
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Affiliation(s)
- Christine Legay
- Ecole Normale Supérieure Paris-Saclay, Université Paris-Saclay, 91290, Gif-Sur-Yvette, France
| | - Sophie Doublier
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Université Paris Cité, Sorbonne Université, INSERM, 75006, Paris, France
| | - Sylvie Babajko
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Université Paris Cité, Sorbonne Université, INSERM, 75006, Paris, France
- Biomedical Research in Odontology, Université Paris Cité, 92120, Montrouge, France
| | - Jean-Marc Ricort
- Ecole Normale Supérieure Paris-Saclay, Université Paris-Saclay, 91290, Gif-Sur-Yvette, France.
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Université Paris Cité, Sorbonne Université, INSERM, 75006, Paris, France.
- Biomedical Research in Odontology, Université Paris Cité, 92120, Montrouge, France.
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16
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Invernizzi A, Chhablani J, Viola F, Gabrielle PH, Zarranz-Ventura J, Staurenghi G. Diabetic retinopathy in the pediatric population: Pathophysiology, screening, current and future treatments. Pharmacol Res 2023; 188:106670. [PMID: 36681366 DOI: 10.1016/j.phrs.2023.106670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/20/2023]
Abstract
Diabetic retinopathy (DR) is a sight threatening complication of diabetes mellitus (DM). The incidence of DR in the pediatric population has increased in the last two decades and it is expected to further rise in the future, following the increase in DM prevalence and obesity in youth. As early stages of the retinal disease are asymptomatic, screening programs are of extreme importance to guarantee a prompt diagnosis and avoid progression to more advanced, sight threatening stages. The management of DR comprises a wide range of actions starting from glycemic control, continuing with systemic and local medical treatments, up to para-surgical and surgical approaches to deal with the more aggressive complications. In this review we will describe the pathophysiology of DR trying to understand all the possible targets for currently available or future treatments. We will briefly consider the impact of screening techniques, screening strategies and their social and economic impact. Finally a large part of the review will be dedicated to medical and surgical treatments for DR including both currently available and under development therapies. Most of the available data in the literature on DR are focused on the adult population. The aim of our work is to provide clinicians and researchers with a comprehensive overview of the state of the art regarding DR in the pediatric population, considering the increasing numbers of this diseases in youth and the inevitable consequences that such a chronic disease could have if poorly managed in children.
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Affiliation(s)
- Alessandro Invernizzi
- Eye Clinic, Department of Biomedical and Clinical Science "Luigi Sacco", Luigi Sacco Hospital, University of Milan, Milan, Italy; The University of Sydney, Save Sight Institute, Discipline of Ophthalmology, Sydney Medical School, Sydney, New South Wales, Australia.
| | - Jay Chhablani
- UPMC Eye Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Francesco Viola
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Pierre Henry Gabrielle
- Department of Ophthalmology, University Hospital, 14 rue Paul Gaffarel, 21079 Dijon, France
| | - Javier Zarranz-Ventura
- Institut Clínic of Ophthalmology (ICOF), Hospital Clínic, Barcelona, Spain; August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Giovanni Staurenghi
- Eye Clinic, Department of Biomedical and Clinical Science "Luigi Sacco", Luigi Sacco Hospital, University of Milan, Milan, Italy
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17
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Chen J, Chen H, Muhammad I, Han T, Zhang D, Li B, Zhou X, Zhou F. Protein kinase D1 promotes the survival of random-pattern skin flaps in rats. Biochem Biophys Res Commun 2023; 641:67-76. [PMID: 36525926 DOI: 10.1016/j.bbrc.2022.12.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 11/20/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND In reconstructive surgery, random skin flaps are commonly used tools to cover skin defects, however, their applicability and size are limited by post-operative complications such as marginal ischemia-reperfusion injury and flap necrosis. Protein kinase D1 (PKD1), a calcium/calmodulin-dependent serine/threonine kinase, is known to induce angiogenesis and has been shown to mitigate ischemia in cardiovascular diseases. However, the role of PKD1 has not been investigated in skin flaps. METHOD Seventy-five male Sprague-Dawley rats with skin flaps were randomly divided into three groups: control, PKD1, and CID755673. Seven days following surgery, we assessed the general view and survival rate of the flap using histological analysis. Laser Doppler and lead oxide/gelatin angiography were used to evaluate microcirculation blood flow. Histopathological changes, neovascularization and microvascular density (MVD). were examined and calculated using microscopy after H&E staining. Protein expression levels were determined using immunoblotting and immunohistochemistry techniques. RESULT PKD1 significantly improved flap survival by upregulating angiogenic factors VEGF and cadherin5 and increasing antioxidant enzymes SOD, eNOS, and HO1, as well as reducing caspase 3, cytochrome c, and Bax expression, and attenuating IL-1β, IL-6, and TNF-α. In the PKD1 group, PKD1 increased neovascularization, and blood flow and flap survival areas were larger as compared to the control and CID755673 groups. CONCLUSION These findings show that PKD1 accelerates angiogenesis, reduces oxidative stress, and impedes apoptosis and inflammation, thus resulting in improved flap survival. Our observations indicated that PKD1 could be a therapeutic target for flap failure treatment.
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Affiliation(s)
- Jianpeng Chen
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Hongyu Chen
- Zhejiang University School of Medicine, China
| | - Ismail Muhammad
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Tao Han
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | - Dupiao Zhang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, China
| | | | - Xijie Zhou
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, China.
| | - Feiya Zhou
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou, China.
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18
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Targeting Phospholipase D Pharmacologically Prevents Phagocytic Function Loss of Retinal Pigment Epithelium Cells Exposed to High Glucose Levels. Int J Mol Sci 2022; 23:ijms231911823. [PMID: 36233124 PMCID: PMC9570224 DOI: 10.3390/ijms231911823] [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: 09/09/2022] [Revised: 09/23/2022] [Accepted: 10/01/2022] [Indexed: 11/17/2022] Open
Abstract
We previously described the participation of canonical phospholipase D isoforms (PLD1 and PLD2) in the inflammatory response of retinal pigment epithelium (RPE) cells exposed to high glucose concentrations (HG). Here, we studied the role of the PLD pathway in RPE phagocytic function. For this purpose, ARPE-19 cells were exposed to HG (33 mM) or to normal glucose concentration (NG, 5.5 mM) and phagocytosis was measured using pHrodo™ green bioparticles® or photoreceptor outer segments (POS). HG exposure for 48 and 72 h reduced phagocytic function of ARPE-19 cells, and this loss of function was prevented when cells were treated with 5 μM of PLD1 (VU0359595 or PLD1i) or PLD2 (VU0285655-1 or PLD2i) selective inhibitors. Furthermore, PLD1i and PLD2i did not affect RPE phagocytosis under physiological conditions and prevented oxidative stress induced by HG. In addition, we demonstrated PLD1 and PLD2 expression in ABC cells, a novel human RPE cell line. Under physiological conditions, PLD1i and PLD2i did not affect ABC cell viability, and partial silencing of both PLDs did not affect ABC cell POS phagocytosis. In conclusion, PLD1i and PLD2i prevent the loss of phagocytic function of RPE cells exposed to HG without affecting RPE function or viability under non-inflammatory conditions.
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19
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Pan D, Xu L, Guo M. The role of protein kinase C in diabetic microvascular complications. Front Endocrinol (Lausanne) 2022; 13:973058. [PMID: 36060954 PMCID: PMC9433088 DOI: 10.3389/fendo.2022.973058] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 07/25/2022] [Indexed: 11/17/2022] Open
Abstract
Protein kinase C (PKC) is a family of serine/threonine protein kinases, the activation of which plays an important role in the development of diabetic microvascular complications. The activation of PKC under high-glucose conditions stimulates redox reactions and leads to an accumulation of redox stress. As a result, various types of cells in the microvasculature are influenced, leading to changes in blood flow, microvascular permeability, extracellular matrix accumulation, basement thickening and angiogenesis. Structural and functional disorders further exacerbate diabetic microvascular complications. Here, we review the roles of PKC in the development of diabetic microvascular complications, presenting evidence from experiments and clinical trials.
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Affiliation(s)
- Deng Pan
- Xiyuan hospital of China Academy of Chinese Medical Sciences, Beijing, China
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
- Graduate School of Beijing University of Chinese Medicine, Beijing, China
| | - Lin Xu
- Gynecological Department of Traditional Chinese Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Ming Guo
- Xiyuan hospital of China Academy of Chinese Medical Sciences, Beijing, China
- National Clinical Research Centre for Chinese Medicine Cardiology, Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China
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Bermúdez V, Tenconi PE, Giusto NM, Mateos MV. Canonical phospholipase D isoforms in visual function and ocular response to stress. Exp Eye Res 2022; 217:108976. [DOI: 10.1016/j.exer.2022.108976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/09/2022] [Accepted: 02/01/2022] [Indexed: 01/10/2023]
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21
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Tsilosani A, Gao C, Zhang W. Aldosterone-Regulated Sodium Transport and Blood Pressure. Front Physiol 2022; 13:770375. [PMID: 35197862 PMCID: PMC8859437 DOI: 10.3389/fphys.2022.770375] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 01/06/2022] [Indexed: 11/13/2022] Open
Abstract
Aldosterone is a major mineralocorticoid steroid hormone secreted by glomerulosa cells in the adrenal cortex. It regulates a variety of physiological responses including those to oxidative stress, inflammation, fluid disruption, and abnormal blood pressure through its actions on various tissues including the kidney, heart, and the central nervous system. Aldosterone synthesis is primarily regulated by angiotensin II, K+ concentration, and adrenocorticotrophic hormone. Elevated serum aldosterone levels increase blood pressure largely by increasing Na+ re-absorption in the kidney through regulating transcription and activity of the epithelial sodium channel (ENaC). This review focuses on the signaling pathways involved in aldosterone synthesis and its effects on Na+ reabsorption through ENaC.
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Affiliation(s)
- Akaki Tsilosani
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, NY, United States
| | - Chao Gao
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, NY, United States
| | - Wenzheng Zhang
- Department of Regenerative & Cancer Cell Biology, Albany Medical College, Albany, NY, United States
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22
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Tsuji K, Ishii T, Kobayakawa T, Ohashi N, Nomura W, Tamamura H. Fluorescence resonance energy transfer-based screening for protein kinase C ligands using 6-methoxynaphthalene-labeled 1,2-diacylglycerol-lactones. Org Biomol Chem 2021; 19:8264-8271. [PMID: 34338277 DOI: 10.1039/d1ob00814e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Protein kinase C (PKC) is associated with a central cellular signal transduction pathway and disorders such as cancer and Alzheimer-type dementia and is therefore a target for the treatment of these diseases. The development of simple methods suitable for high-throughput screening to find potent PKC ligands is desirable. We have developed an assay based on fluorescence-quenching screening with a solvatochromic fluorophore attached to a competitive probe and its alternative method based on Förster/fluorescence resonance energy transfer (FRET) phenomena. Here, an improved FRET-based PKC binding assay using a diacylglycerol (DAG) lactone labeled with a donor fluorescent dye, 6-methoxynaphthalene (6MN), was developed. The 6MN-labeled DAG-lactone has a higher binding affinity for the PKCδ C1b domain and the fluorescent PKCδ C1b domain labeled by fluorescein as an acceptor fluorescent dye (Fl-δC1b) than the diethylaminocoumarin (DEAC)-labeled DAG-lactone. The combination of the 6MN-labeled DAG-lactone and Fl-δC1b showed a change in fluorescence response larger than that of the DEAC-labeled DAG-lactone and Fl-δC1b. The IC50 values of known PKC ligands calculated by the present FRET-based method using 6MN-labeled DAG-lactone agree well with the Ki values obtained by the conventional radioisotope-based assays. Some false positive compounds, identified by the previous solvatochromic fluorophore-based method, were found to be negative by this method. The present FRET-based PKC binding assay is more sensitive and could be more useful.
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Affiliation(s)
- Kohei Tsuji
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Takahiro Ishii
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Takuya Kobayakawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Nami Ohashi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Wataru Nomura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kandasurugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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23
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The PKD-Dependent Biogenesis of TGN-to-Plasma Membrane Transport Carriers. Cells 2021; 10:cells10071618. [PMID: 34203456 PMCID: PMC8303525 DOI: 10.3390/cells10071618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/14/2021] [Accepted: 06/24/2021] [Indexed: 01/30/2023] Open
Abstract
Membrane trafficking is essential for processing and transport of proteins and lipids and to establish cell compartmentation and tissue organization. Cells respond to their needs and control the quantity and quality of protein secretion accordingly. In this review, we focus on a particular membrane trafficking route from the trans-Golgi network (TGN) to the cell surface: protein kinase D (PKD)-dependent pathway for constitutive secretion mediated by carriers of the TGN to the cell surface (CARTS). Recent findings highlight the importance of lipid signaling by organelle membrane contact sites (MCSs) in this pathway. Finally, we discuss our current understanding of multiple signaling pathways for membrane trafficking regulation mediated by PKD, G protein-coupled receptors (GPCRs), growth factors, metabolites, and mechanosensors.
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24
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Lv D, Chen H, Feng Y, Cui B, Kang Y, Zhang P, Luo M, Chen J. Small-Molecule Inhibitor Targeting Protein Kinase D: A Potential Therapeutic Strategy. Front Oncol 2021; 11:680221. [PMID: 34249722 PMCID: PMC8263921 DOI: 10.3389/fonc.2021.680221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 06/07/2021] [Indexed: 02/05/2023] Open
Abstract
The protein kinase D (PKD) family is a family of serine-threonine kinases that are members of the calcium/calmodulin-dependent kinase (CaMK) superfamily. PKDs have been increasingly implicated in multiple pivotal cellular processes and pathological conditions. PKD dysregulation is associated with several diseases, including cancer, inflammation, and obesity. Over the past few years, small-molecule inhibitors have emerged as alternative targeted therapy with fewer adverse side effects than currently available chemotherapy, and these specifically targeted inhibitors limit non-specific toxicities. The successful development of PKD inhibitors would significantly suppress the growth and proliferation of various cancers and inhibit the progression of other diseases. Various PKD inhibitors have been studied in the preclinical setting. In this context, we summarize the PKD inhibitors under investigation and their application for different kinds of diseases.
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Affiliation(s)
- Die Lv
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hongli Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yun Feng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Bomiao Cui
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yingzhu Kang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ping Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Min Luo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiao Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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25
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Silva M, Peng T, Zhao X, Li S, Farhan M, Zheng W. Recent trends in drug-delivery systems for the treatment of diabetic retinopathy and associated fibrosis. Adv Drug Deliv Rev 2021; 173:439-460. [PMID: 33857553 DOI: 10.1016/j.addr.2021.04.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/05/2021] [Accepted: 04/08/2021] [Indexed: 12/12/2022]
Abstract
Diabetic retinopathy is a frequent microvascular complication of diabetes and a major cause of visual impairment. In advanced stages, the abnormal neovascularization can lead to fibrosis and subsequent tractional retinal detachment and blindness. The low bioavailability of the drugs at the target site imposed by the anatomic and physiologic barriers within the eye, requires long term treatments with frequent injections that often compromise patient's compliance and increase the risk of developing more complications. In recent years, much effort has been put towards the development of new drug delivery platforms aiming to enhance their permeation, to prolong their retention time at the target site and to provide a sustained release with reduced toxicity and improved efficacy. This review provides an overview of the etiology and pathophysiology of diabetic retinopathy and current treatments. It addresses the specific challenges associated to the different ocular delivery routes and provides a critical review of the most recent developments made in the drug delivery field.
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Affiliation(s)
- Marta Silva
- Centre of Reproduction, Development and Aging, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau
| | - Tangming Peng
- Centre of Reproduction, Development and Aging, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau
| | - Xia Zhao
- Centre of Reproduction, Development and Aging, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau
| | - Shuai Li
- Centre of Reproduction, Development and Aging, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau
| | - Mohd Farhan
- Centre of Reproduction, Development and Aging, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau
| | - Wenhua Zheng
- Centre of Reproduction, Development and Aging, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau.
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26
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Matsuda K, Kobayakawa T, Kariya R, Tsuchiya K, Ryu S, Tsuji K, Ishii T, Gatanaga H, Yoshimura K, Okada S, Hamada A, Mitsuya H, Tamamura H, Maeda K. A Therapeutic Strategy to Combat HIV-1 Latently Infected Cells With a Combination of Latency-Reversing Agents Containing DAG-Lactone PKC Activators. Front Microbiol 2021; 12:636276. [PMID: 33815322 PMCID: PMC8010149 DOI: 10.3389/fmicb.2021.636276] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/01/2021] [Indexed: 11/13/2022] Open
Abstract
Advances in antiviral therapy have dramatically improved the therapeutic effects on HIV type 1 (HIV-1) infection. However, even with potent combined antiretroviral therapy, HIV-1 latently infected cells cannot be fully eradicated. Latency-reversing agents (LRAs) are considered a potential tool for eliminating such cells; however, recent in vitro and in vivo studies have raised serious concerns regarding the efficacy and safety of the "shock and kill" strategy using LRAs. In the present study, we examined the activity and safety of a panel of protein kinase C (PKC) activators with a diacylglycerol (DAG)-lactone structure that mimics DAG, an endogenous ligand for PKC isozymes. YSE028, a DAG-lactone derivative, reversed HIV-1 latency in vitro when tested using HIV-1 latently infected cells (e.g., ACH2 and J-Lat cells) and primary cells from HIV-1-infected individuals. The activity of YSE028 in reversing HIV-1 latency was synergistically enhanced when combined with JQ1, a bromodomain and extra-terminal inhibitor LRA. DAG-lactone PKC activators also induced caspase-mediated apoptosis, specifically in HIV-1 latently infected cells. In addition, these DAG-lactone PKC activators showed minimal toxicity in vitro and in vivo. These data suggest that DAG-lactone PKC activators may serve as potential candidates for combination therapy against HIV-1 latently infected cells, especially when combined with other LRAs with a different mechanism, to minimize side effects and achieve maximum efficacy in various reservoir cells of the whole body.
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Affiliation(s)
- Kouki Matsuda
- National Center for Global Health and Medicine Research Institute, Tokyo, Japan
| | - Takuya Kobayakawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Bunkyō, Japan
| | - Ryusho Kariya
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
| | - Kiyoto Tsuchiya
- AIDS Clinical Center, National Center for Global Health and Medicine, Shinjuku, Japan
| | - Shoraku Ryu
- Division of Molecular Pharmacology, National Cancer Center Research Institute, Tokyo, Japan
| | - Kohei Tsuji
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Bunkyō, Japan
| | - Takahiro Ishii
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Bunkyō, Japan
| | - Hiroyuki Gatanaga
- AIDS Clinical Center, National Center for Global Health and Medicine, Shinjuku, Japan
| | - Kazuhisa Yoshimura
- AIDS Research Centre, National Institute of Infectious Diseases, Tokyo, Japan.,Tokyo Metropolitan Institute of Public Health, Tokyo, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
| | - Akinobu Hamada
- Division of Molecular Pharmacology, National Cancer Center Research Institute, Tokyo, Japan
| | - Hiroaki Mitsuya
- National Center for Global Health and Medicine Research Institute, Tokyo, Japan.,HIV and AIDS Malignancy Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Hirokazu Tamamura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Bunkyō, Japan
| | - Kenji Maeda
- National Center for Global Health and Medicine Research Institute, Tokyo, Japan
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27
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Liu Y, Song H, Zhou Y, Ma X, Xu J, Yu Z, Chen L. The oncogenic role of protein kinase D3 in cancer. J Cancer 2021; 12:735-739. [PMID: 33403031 PMCID: PMC7778554 DOI: 10.7150/jca.50899] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/30/2020] [Indexed: 01/12/2023] Open
Abstract
Protein kinase D3 (PRKD3), a serine/threonine kinase, belongs to protein kinase D family, which contains three members: PRKD1, PRKD2, and PRKD3. PRKD3 is activated by many stimuli including phorbol esters, and G-protein-coupled receptor agonists. PRKD3 promotes cancer cell proliferation, growth, migration, and invasion in various tumor types including colorectal, gastric, hepatic, prostate, and breast cancer. Accumulating data supports that PRKD3 is a promising therapeutic target for treatment of cancer. This review discusses the functions and mechanisms of PRKD3 in promoting tumorigenesis and tumor progression of various tumor types as well as the latest developments of small-molecule inhibitors selection for PRKD/PRKD3.
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Affiliation(s)
- Yan Liu
- The Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, P. R. China.,Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Institute of cancer, Department of biochemistry, College of Life Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Hang Song
- School of Integrated Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei 230012, P. R.China
| | - Yehui Zhou
- The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, P. R. China
| | - Xinxing Ma
- The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, P. R. China
| | - Jing Xu
- School of Integrated Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei 230012, P. R.China
| | - Zhenghong Yu
- Department of Rheumatology and Immunology, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R.China
| | - Liming Chen
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, Institute of cancer, Department of biochemistry, College of Life Science, Nanjing Normal University, Nanjing 210023, P. R. China
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28
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Tyagi K, Roy A. Evaluating the current status of protein kinase C (PKC)-protein kinase D (PKD) signalling axis as a novel therapeutic target in ovarian cancer. Biochim Biophys Acta Rev Cancer 2020; 1875:188496. [PMID: 33383102 DOI: 10.1016/j.bbcan.2020.188496] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 12/19/2020] [Accepted: 12/19/2020] [Indexed: 12/14/2022]
Abstract
Ovarian cancer, especially high grade serous ovarian cancer is one of the most lethal gynaecological malignancies with high relapse rate and patient death. Notwithstanding development of several targeted treatment and immunotherapeutic approaches, researchers fail to turn ovarian cancer into a manageable disease. Protein kinase C (PKC) and protein kinase D (PKD) are families of evolutionarily conserved serine/threonine kinases that can be activated by a plethora of extracellular stimuli such as hormones, growth factors and G-protein coupled receptor agonists. Recent literature suggests that a signalling cascade initiated by these two protein kinases regulates a battery of cellular and physiological processes involved in tumorigenesis including cell proliferation, migration, invasion and angiogenesis. In an urgent need to discover novel therapeutic interventions against a deadly pathology like ovarian cancer, we have discussed the status quo of PKC/PKD signalling axis in context of this disease. Additionally, apart from discussing the structural properties and activation mechanisms of PKC/PKD, we have provided a comprehensive review of the recent reports on tumor promoting functions of PKC isoforms and discussed the potential of PKC/PKD signalling axis as a novel target in this lethal pathology. Furthermore, in this review, we have discussed the significance of several recent clinical trials and development of small molecule inhibitors that target PKC/PKD signalling axis in ovarian cancer.
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Affiliation(s)
- Komal Tyagi
- Amity Institute of Molecular Medicine and Stem Cell Research, Amity University, Sector-125, Noida, Uttar Pradesh 201303, India
| | - Adhiraj Roy
- Amity Institute of Molecular Medicine and Stem Cell Research, Amity University, Sector-125, Noida, Uttar Pradesh 201303, India.
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29
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Veazey JM, Eliseeva SI, Hillman SE, Stiles K, Smyth TR, Morrissey CE, Tillotson EJ, Topham DJ, Chapman TJ, Georas SN. Inhibiting Protein Kinase D Promotes Airway Epithelial Barrier Integrity in Mouse Models of Influenza A Virus Infection. Front Immunol 2020; 11:580401. [PMID: 33381112 PMCID: PMC7767883 DOI: 10.3389/fimmu.2020.580401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/05/2020] [Indexed: 11/13/2022] Open
Abstract
Rationale Protein kinase D (PKD) is a serine/threonine kinase family that is involved in a wide array of signaling pathways. Although PKD has been implicated in immune responses, relatively little is known about the function of PKD in the lung or during viral infections. Objectives We investigated the hypothesis that PKD is involved in multiple aspects of host response to viral infection. Methods The selective PKD inhibitor CRT0010166 was administered to C57BL/6 mice prior to and during challenge with either inhaled double-stranded RNA or Influenza A Virus. PKD signaling pathways were investigated in human bronchial epithelial cells treated with CRT0010166, double-stranded RNA, and/or infected with Influenza A Virus. Measurements Total protein and albumin accumulation in the bronchoalveolar fluid was used to asses inside/out leak. Clearance of inhaled FITC-dextran out of the airspace was used to assess outside/in leak. Cytokines and neutrophils in bronchoalveolar lavage were assayed with ELISAs and cytospins respectively. Viral RNA level was assessed with RT-PCR and protein level assessed by ELISA. Main Results PKD inhibition prevented airway barrier dysfunction and pro-inflammatory cytokine release. Epithelial cells express PKD3, and PKD3 siRNA knock-down inhibited polyI:C induced cytokine production. Lung epithelial-specific deletion of PKD3 (CC10-Cre x PKD3-floxed mice) partially attenuated polyI:C-induced barrier disruption in vivo. Mechanistically, we found that PKD promoted cytokine mRNA transcription, not secretion, likely through activating the transcription factor Sp1. Finally, prophylactic CRT treatment of mice promoted barrier integrity during influenza virus infection and reduced viral burden. Conclusions Inhibiting PKD promotes barrier integrity, limit pathogenic cytokine levels, and restrict Influenza A Virus infection. Therefore, PKD is an attractive target for novel antiviral therapeutics.
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Affiliation(s)
- Janelle M Veazey
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY, United States
| | - Sophia I Eliseeva
- Department of Medicine, Pulmonary and Critical Care, University of Rochester, Rochester, NY, United States
| | - Sara E Hillman
- Department of Medicine, Pulmonary and Critical Care, University of Rochester, Rochester, NY, United States
| | - Kristie Stiles
- Department of Medicine, Pulmonary and Critical Care, University of Rochester, Rochester, NY, United States
| | - Timothy R Smyth
- Department of Environmental Medicine, University of Rochester, Rochester, NY, United States
| | | | - Erika J Tillotson
- Department of Biology, Cornell University, Ithaca, NY, United States
| | - Dave J Topham
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY, United States
| | - Timothy J Chapman
- Center for Infectious Disease and Immunology, Rochester Regional Health, Rochester, NY, United States
| | - Steve N Georas
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY, United States.,Department of Medicine, Pulmonary and Critical Care, University of Rochester, Rochester, NY, United States.,Department of Environmental Medicine, University of Rochester, Rochester, NY, United States
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30
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Na K, Kim M, Kim CY, Lim JS, Cho JY, Shin H, Lee HJ, Kang BJ, Han DH, Kim H, Baik JH, Swiatek-de Lange M, Karl J, Paik YK. Potential Regulatory Role of Human-Carboxylesterase-1 Glycosylation in Liver Cancer Cell Growth. J Proteome Res 2020; 19:4867-4883. [PMID: 33206527 DOI: 10.1021/acs.jproteome.0c00787] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We previously reported that human carboxylesterase 1 (CES1), a serine esterase containing a unique N-linked glycosyl group at Asn79 (N79 CES1), is a candidate serological marker of hepatocellular carcinoma (HCC). CES1 is normally present at low-to-undetectable levels in normal human plasma, HCC tumors, and major liver cancer cell lines. To investigate the potential mechanism underlying the suppression of CES1 expression in liver cancer cells, we took advantage of the low detectability of this marker in tumors by overexpressing CES1 in multiple HCC cell lines, including stable Hep3B cells. We found that the population of CES1-overexpressing (OE) cells decreased and that their doubling time was longer compared with mock control liver cancer cells. Using interactive transcriptome, proteome, and subsequent Gene Ontology enrichment analysis of CES1-OE cells, we found substantial decreases in the expression levels of genes involved in cell cycle regulation and proliferation. This antiproliferative function of the N79 glycan of CES1 was further supported by quantitative real-time polymerase chain reaction, flow cytometry, and an apoptosis protein array assay. An analysis of the levels of key signaling target proteins via Western blotting suggested that CES1 overexpression exerted an antiproliferative effect via the PKD1/PKCμ signaling pathway. Similar results were also seen in another HCC cell line (PLC/RFP/5) after transient transfection with CES1 but not in similarly treated non-HCC cell lines (e.g., HeLa and Tera-1 cells), suggesting that CES1 likely exerts a liver cell-type-specific suppressive effect. Given that the N-linked glycosyl group at Asn79 (N79 glycan) of CES1 is known to influence CES1 enzyme activity, we hypothesized that the post-translational modification of CES1 at N79 may be linked to its antiproliferative activity. To investigate the regulatory effect of the N79 glycan on cellular growth, we mutated the single N-glycosylation site in CES1 from Asn to Gln (CES1-N79Q) via site-directed mutagenesis. Fluorescence 2-D difference gel electrophoresis protein expression analysis of cell lysates revealed an increase in cell growth and a decrease in doubling time in cells carrying the N79Q mutation. Thus our results suggest that CES1 exerts an antiproliferative effect in liver cancer cells and that the single N-linked glycosylation at Asn79 plays a potential regulatory role. These functions may underlie the undetectability of CES1 in human HCC tumors and liver cancer cell lines. Mass spectrometry data are available via ProteomeXchange under the identifier PXD021573.
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Affiliation(s)
- Keun Na
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
| | - Minjoo Kim
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
| | - Chae-Yeon Kim
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
| | - Jong-Sun Lim
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
| | - Jin-Young Cho
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
| | - Heon Shin
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
| | - Hyo Jin Lee
- Department of Life Sciences, Korea University, 145 Anamro, Seongbuk-ku, Seoul 02841, South Korea
| | - Byeong Jun Kang
- Department of Life Sciences, Korea University, 145 Anamro, Seongbuk-ku, Seoul 02841, South Korea
| | | | | | - Ja-Hyun Baik
- Department of Life Sciences, Korea University, 145 Anamro, Seongbuk-ku, Seoul 02841, South Korea
| | | | - Johann Karl
- Roche Diagnostics, GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Young-Ki Paik
- Yonsei Proteome Research Center, Yonsei University, 50 Yonsei-ro, Seodaemoon-ku, Seoul 03722, South Korea
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31
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Kang Q, Yang C. Oxidative stress and diabetic retinopathy: Molecular mechanisms, pathogenetic role and therapeutic implications. Redox Biol 2020; 37:101799. [PMID: 33248932 PMCID: PMC7767789 DOI: 10.1016/j.redox.2020.101799] [Citation(s) in RCA: 416] [Impact Index Per Article: 104.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 10/29/2020] [Accepted: 11/10/2020] [Indexed: 12/18/2022] Open
Abstract
Oxidative stress, a cytopathic outcome of excessive generation of ROS and the repression of antioxidant defense system for ROS elimination, is involved in the pathogenesis of multiple diseases, including diabetes and its complications. Retinopathy, a microvascular complication of diabetes, is the primary cause of acquired blindness in diabetic patients. Oxidative stress has been verified as one critical contributor to the pathogenesis of diabetic retinopathy. Oxidative stress can both contribute to and result from the metabolic abnormalities induced by hyperglycemia, mainly including the increased flux of the polyol pathway and hexosamine pathway, the hyper-activation of protein kinase C (PKC) isoforms, and the accumulation of advanced glycation end products (AGEs). Moreover, the repression of the antioxidant defense system by hyperglycemia-mediated epigenetic modification also leads to the imbalance between the scavenging and production of ROS. Excessive accumulation of ROS induces mitochondrial damage, cellular apoptosis, inflammation, lipid peroxidation, and structural and functional alterations in retina. Therefore, it is important to understand and elucidate the oxidative stress-related mechanisms underlying the progress of diabetic retinopathy. In addition, the abnormalities correlated with oxidative stress provide multiple potential therapeutic targets to develop safe and effective treatments for diabetic retinopathy. Here, we also summarized the main antioxidant therapeutic strategies to control this disease. Oxidative stress can both contribute to and result from hyperglycemia-induced metabolic abnormalities in retina. Genes important in regulation of ROS are epigenetically modified, increasing ROS accumulation in retina. Oxidative stress is closely associated with the pathological changes in the progress of diabetic retinopathy. Antioxidants ameliorate retinopathy through targeting multiple steps of oxidative stress.
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Affiliation(s)
- Qingzheng Kang
- Institute for Advanced Study, Shenzhen University, Nanshan District, Shenzhen, 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Chunxue Yang
- Department of Pathology, The University of Hong Kong, Hong Kong SAR, 999077, China.
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Sun A, Simsek Papur O, Dirkx E, Wong L, Sips T, Wang S, Strzelecka A, Nabben M, Glatz JFC, Neumann D, Luiken JJFP. Phosphatidylinositol 4-kinase IIIβ mediates contraction-induced GLUT4 translocation and shows its anti-diabetic action in cardiomyocytes. Cell Mol Life Sci 2020; 78:2839-2856. [PMID: 33090289 PMCID: PMC8004495 DOI: 10.1007/s00018-020-03669-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 08/31/2020] [Accepted: 10/05/2020] [Indexed: 01/15/2023]
Abstract
In the diabetic heart, long-chain fatty acid (LCFA) uptake is increased at the expense of glucose uptake. This metabolic shift ultimately leads to insulin resistance and a reduced cardiac function. Therefore, signaling kinases that mediate glucose uptake without simultaneously stimulating LCFA uptake could be considered attractive anti-diabetic targets. Phosphatidylinositol-4-kinase-IIIβ (PI4KIIIβ) is a lipid kinase downstream of protein kinase D1 (PKD1) that mediates Golgi-to-plasma membrane vesicular trafficking in HeLa-cells. In this study, we evaluated whether PI4KIIIβ is involved in myocellular GLUT4 translocation induced by contraction or oligomycin (an F1F0-ATP synthase inhibitor that activates contraction-like signaling). Pharmacological targeting, with compound MI14, or genetic silencing of PI4KIIIβ inhibited contraction/oligomycin-stimulated GLUT4 translocation and glucose uptake in cardiomyocytes but did not affect CD36 translocation nor LCFA uptake. Addition of the PI4KIIIβ enzymatic reaction product phosphatidylinositol-4-phosphate restored oligomycin-stimulated glucose uptake in the presence of MI14. PI4KIIIβ activation by PKD1 involves Ser294 phosphorylation and altered its localization with unchanged enzymatic activity. Adenoviral PI4KIIIβ overexpression stimulated glucose uptake, but did not activate hypertrophic signaling, indicating that unlike PKD1, PI4KIIIβ is selectively involved in GLUT4 translocation. Finally, PI4KIIIβ overexpression prevented insulin resistance and contractile dysfunction in lipid-overexposed cardiomyocytes. Together, our studies identify PI4KIIIβ as positive and selective regulator of GLUT4 translocation in response to contraction-like signaling, suggesting PI4KIIIβ as a promising target to rescue defective glucose uptake in diabetics.
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Affiliation(s)
- A Sun
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - O Simsek Papur
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - E Dirkx
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - L Wong
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,Department of Clinical Genetics, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - T Sips
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - S Wang
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - A Strzelecka
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - M Nabben
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,Department of Clinical Genetics, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht, The Netherlands
| | - J F C Glatz
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,Department of Clinical Genetics, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands
| | - D Neumann
- Department of Pathology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht, The Netherlands
| | - J J F P Luiken
- Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, 6200 MD, Maastricht, The Netherlands.
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Tsai JY, Rédei D, Hohmann J, Wu CC. 12-Deoxyphorbol Esters Induce Growth Arrest and Apoptosis in Human Lung Cancer A549 Cells Via Activation of PKC-δ/PKD/ERK Signaling Pathway. Int J Mol Sci 2020; 21:E7579. [PMID: 33066446 PMCID: PMC7589005 DOI: 10.3390/ijms21207579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 12/16/2022] Open
Abstract
Prostratin, a non-tumor promoting 12-deoxyphorbol ester, has been reported as a protein kinase C (PKC) activator and is shown to have anti-proliferative activity in certain cancer cell types. Here we show that GRC-2, a prostratin analogue isolated from Euphorbia grandicornis, is ten-fold more potent than prostratin for inhibiting the growth of human non-small cell lung cancer (NSCLC) A549 cells. Flow cytometry assay revealed that GRC-2 and prostratin inhibited cell cycle progression at the G2/M phase and induced apoptosis. The cytotoxic effect of GRC-2 and prostratin was accompanied by activation and nuclear translocation of PKC-δ and PKD as well as hyperactivation of extracellular signal-related kinase (ERK). Knockdown of either PKC-δ, PKD or ERK significantly protected A549 cancer cells from GRC-2- and prostratin-induced growth arrest as well as apoptosis. Taken together, our results have shown that prostratin and a more potent analogue GRC-2 reduce cell viability in NSCLC A549 cells, at least in part, through activation of the PKC-δ/PKD/ERK pathway, suggesting the potential of prostratin and GRC-2 as anticancer agents.
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Affiliation(s)
- Ju-Ying Tsai
- Graduate Institute of Natural Products, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Dóra Rédei
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (D.R.); (J.H.)
| | - Judit Hohmann
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary; (D.R.); (J.H.)
| | - Chin-Chung Wu
- Graduate Institute of Natural Products, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
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Fagotto F. EpCAM as Modulator of Tissue Plasticity. Cells 2020; 9:E2128. [PMID: 32961790 PMCID: PMC7563481 DOI: 10.3390/cells9092128] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/24/2020] [Accepted: 09/14/2020] [Indexed: 01/01/2023] Open
Abstract
The Epithelial Cell Adhesion Molecule or EpCAM is a well-known marker highly expressed in carcinomas and showing a strong correlation with poor cancer prognosis. While its name relates to its proposed function as a cell adhesion molecule, EpCAM has been shown to have various signalling functions. In particular, it has been identified as an important positive regulator of cell adhesion and migration, playing an essential role in embryonic morphogenesis as well as intestinal homeostasis. This activity is not due to its putative adhesive function, but rather to its ability to repress myosin contractility by impinging on a PKC signalling cascade. This mechanism confers EpCAM the unique property of favouring tissue plasticity. I review here the currently available data, comment on possible connections with other properties of EpCAM, and discuss the potential significance in the context of cancer invasion.
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Affiliation(s)
- François Fagotto
- CRBM, University of Montpellier and CNRS, 34293 Montpellier, France
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Beyond Lipid Signaling: Pleiotropic Effects of Diacylglycerol Kinases in Cellular Signaling. Int J Mol Sci 2020; 21:ijms21186861. [PMID: 32962151 PMCID: PMC7554708 DOI: 10.3390/ijms21186861] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/11/2020] [Accepted: 09/16/2020] [Indexed: 12/13/2022] Open
Abstract
The diacylglycerol kinase family, which can attenuate diacylglycerol signaling and activate phosphatidic acid signaling, regulates various signaling transductions in the mammalian cells. Studies on the regulation of diacylglycerol and phosphatidic acid levels by various enzymes, the identification and characterization of various diacylglycerol and phosphatidic acid-regulated proteins, and the overlap of different diacylglycerol and phosphatidic acid metabolic and signaling processes have revealed the complex and non-redundant roles of diacylglycerol kinases in regulating multiple biochemical and biological networks. In this review article, we summarized recent progress in the complex and non-redundant roles of diacylglycerol kinases, which is expected to aid in restoring dysregulated biochemical and biological networks in various pathological conditions at the bed side.
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Chen S, Jiang Q, Huang P, Hu C, Shen H, Schachner M, Zhao W. The L1 cell adhesion molecule affects protein kinase D1 activity in the cerebral cortex in a mouse model of Alzheimer's disease. Brain Res Bull 2020; 162:141-150. [PMID: 32540419 DOI: 10.1016/j.brainresbull.2020.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 05/29/2020] [Accepted: 06/05/2020] [Indexed: 02/05/2023]
Abstract
Alzheimer's disease (AD) is characterized by deposition of β-amyloid protein (Aβ), neurofibrillary tangles and cognitive deficits resulting from neuronal cell death. In search for the molecular underpinnings of the disease, we were interested in the relationship between Aβ, L1 cell adhesion molecule and protein kinase D1 (PKD1), which are not only implicated in neural development and functional maintenance in the adult, but are also neuroprotective under pathological conditions. Based on our observations that L1 and phosphorylated, i.e. activated, protein kinase PKD1 (pPKD1) co-localize in cultured neurons, we investigated the functional relationship between L1 and pPKD1 in the frontal lobe of an AD human cortical tissue microarray, and found increased and positively correlating levels of both molecules when compared to a non-affected human brain. Also in the APPSWE mouse model of AD, L1 and pPKD1 levels were increased in the frontal lobe. To investigate whether L1 influences PKD1-based functions in AD, cultured cortical neurons were stressed with either H2O2 or oligomeric Aβ1-42, in the presence or absence of recombinant L1 extracellular domain, and PKD1 phosphorylation was measured. As indicated by the cell viability assay, L1 maintained neuronal survival under oxidative stress and under application of oligomeric Aβ1-42, when PKD1 activity was inhibited, suggesting that L1 ameliorates some aspects of Aβ1-42 pathology in parallel with reducing PKD1 function.
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Affiliation(s)
- Shuangxi Chen
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China; The First Affiliated Hospital of University of South China, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan, 421001, People's Republic of China
| | - Qiong Jiang
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Peizhi Huang
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Chengliang Hu
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Huifan Shen
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China
| | - Melitta Schachner
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China; Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, 604 Allison Road, Piscataway, NJ, 08854, USA.
| | - Weijiang Zhao
- Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong, 515041, People's Republic of China.
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Alassaf E, Mueller A. The role of PKC in CXCL8 and CXCL10 directed prostate, breast and leukemic cancer cell migration. Eur J Pharmacol 2020; 886:173453. [PMID: 32777211 DOI: 10.1016/j.ejphar.2020.173453] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 07/30/2020] [Accepted: 07/30/2020] [Indexed: 01/18/2023]
Abstract
Migration of tumour cells is a fundamental process for the formation and progression of metastasis in malignant diseases. Chemokines binding to their cognate receptors induce the migration of cancer cells, however, the molecular signalling pathways involved in this process are not fully understood. Protein kinase C (PKC) has been shown to regulate cell migration, adhesion and proliferation. In order to identify a connection between PKC and tumour progression in breast, prostate and leukaemia cells, the effect of PKC on CXCL8 or CXCL10-mediated cell migration and morphology was analysed. We tested the speed of the migrating cells, morphology, and chemotaxis incubated with different PKC isoforms inhibitors- GF109203X, staurosporine and PKCζ pseudosubstrate inhibitor (PKCζi). We found that the migration of CXCL8-driven PC3 and MDA-MB231 cells in the presence of conventional, novel or atypical PKCs was not affected, but atypical PKCζ is crucial for THP-1 chemotaxis. The speed of CXCL10-activated PC3 and MDA-MB231 cells was significantly reduced in the presence of conventional, novel and atypical PKCζ. THP-1 chemotaxis was again affected by atypical PKCζi. On the other hand, cell area, circularity or aspect ratio were affected by staurosporine in CXCL8 or CXCL10-activated cells, demonstrating a role of PKCα in the rearrangement of the cytoskeleton regardless of the effect on the migration. Consequently, this allows the speculation that different PKC isoforms induce different outcomes in migration and actin cytoskeleton based on the chemokine receptor and/or the cell type.
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Affiliation(s)
- Enana Alassaf
- School of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Anja Mueller
- School of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, UK.
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González-Mancha N, Mérida I. Interplay Between SNX27 and DAG Metabolism in the Control of Trafficking and Signaling at the IS. Int J Mol Sci 2020; 21:ijms21124254. [PMID: 32549284 PMCID: PMC7352468 DOI: 10.3390/ijms21124254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/09/2020] [Accepted: 06/10/2020] [Indexed: 12/13/2022] Open
Abstract
Recognition of antigens displayed on the surface of an antigen-presenting cell (APC) by T-cell receptors (TCR) of a T lymphocyte leads to the formation of a specialized contact between both cells named the immune synapse (IS). This highly organized structure ensures cell–cell communication and sustained T-cell activation. An essential lipid regulating T-cell activation is diacylglycerol (DAG), which accumulates at the cell–cell interface and mediates recruitment and activation of proteins involved in signaling and polarization. Formation of the IS requires rearrangement of the cytoskeleton, translocation of the microtubule-organizing center (MTOC) and vesicular compartments, and reorganization of signaling and adhesion molecules within the cell–cell junction. Among the multiple players involved in this polarized intracellular trafficking, we find sorting nexin 27 (SNX27). This protein translocates to the T cell–APC interface upon TCR activation, and it is suggested to facilitate the transport of cargoes toward this structure. Furthermore, its interaction with diacylglycerol kinase ζ (DGKζ), a negative regulator of DAG, sustains the precise modulation of this lipid and, thus, facilitates IS organization and signaling. Here, we review the role of SNX27, DAG metabolism, and their interplay in the control of T-cell activation and establishment of the IS.
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Plastira I, Bernhart E, Joshi L, Koyani CN, Strohmaier H, Reicher H, Malle E, Sattler W. MAPK signaling determines lysophosphatidic acid (LPA)-induced inflammation in microglia. J Neuroinflammation 2020; 17:127. [PMID: 32326963 PMCID: PMC7178949 DOI: 10.1186/s12974-020-01809-1] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 04/08/2020] [Indexed: 12/12/2022] Open
Abstract
Background In the extracellular environment, lysophosphatidic acid (LPA) species are generated via autotaxin (ATX)-mediated hydrolysis of lysophospholipid precursors. Members of the LPA family are potent lipid mediators transmitting signals via six different G protein-coupled LPA receptors (LPAR1-6). The LPA signaling axis is indispensable for brain development and function of the nervous system; however, during damage of the central nervous system, LPA levels can increase and aberrant signaling events counteract brain function. Here, we investigated regulation of the ATX/LPA/LPAR axis in response to lipopolysaccharide-induced systemic inflammation in mice and potential neurotoxic polarization programs in LPA-activated primary murine microglia. Methods In vivo, LPAR1-6 expression was established by qPCR in whole murine brain homogenates and in FACS-sorted microglia. ELISAs were used to quantitate LPA concentrations in the brain and cyto-/chemokine secretion from primary microglia in vitro. Transcription factor phosphorylation was analyzed by immunoblotting, and plasma membrane markers were analyzed by flow cytometry. We used MAPK inhibitors to study signal integration by the JNK, p38, and ERK1/2 branches in response to LPA-mediated activation of primary microglia. Results Under acute and chronic inflammatory conditions, we observed a significant increase in LPA concentrations and differential regulation of LPAR, ATX (encoded by ENPP2), and cytosolic phospholipase A2 (encoded by PLA2G4A) gene expression in the brain and FACS-sorted microglia. During pathway analyses in vitro, the use of specific MAPK antagonists (SP600125, SB203580, and PD98059) revealed that JNK and p38 inhibition most efficiently attenuated LPA-induced phosphorylation of proinflammatory transcription factors (STAT1 and -3, p65, and c-Jun) and secretion of IL-6 and TNFα. All three inhibitors decreased LPA-mediated secretion of IL-1β, CXCL10, CXCL2, and CCL5. The plasma membrane marker CD40 was solely inhibited by SP600125 while all three inhibitors affected expression of CD86 and CD206. All MAPK antagonists reduced intracellular COX-2 and Arg1 as well as ROS and NO formation, and neurotoxicity of microglia-conditioned media. Conclusion In the present study, we show that systemic inflammation induces aberrant ATX/LPA/LPAR homeostasis in the murine brain. LPA-mediated polarization of primary microglia via MAPK-dependent pathways induces features reminiscent of a neurotoxic phenotype.
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Affiliation(s)
- Ioanna Plastira
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria
| | - Eva Bernhart
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria
| | - Lisha Joshi
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria
| | - Chintan N Koyani
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria.,Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Heimo Strohmaier
- Center for Medical Research, Medical University of Graz, Graz, Austria
| | - Helga Reicher
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria
| | - Ernst Malle
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria
| | - Wolfgang Sattler
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstrasse 6/6, 8010, Graz, Austria. .,Center for Explorative Lipidomics, BioTechMed, Graz, Austria.
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Shang P, Zheng F, Han F, Song Y, Pan Z, Yu S, Zhuang X, Chen S. Lipin1 mediates cognitive impairment in fld mice via PKD-ERK pathway. Biochem Biophys Res Commun 2020; 525:286-291. [PMID: 32087966 DOI: 10.1016/j.bbrc.2020.02.070] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 02/10/2020] [Indexed: 01/20/2023]
Abstract
Lipin1 is important in lipid synthesis because of its phosphatidate phosphatase activity, and it also functions as transcriptional coactivators to regulate the expression of genes involved in lipid metabolism. We found that fld mice exhibit cognitive impairment, and it is related to the DAG-PKD-ERK pathway. We used fld mice to explore the relationship between lipin1 and cognitive function. Our results confirmed the presence of cognitive impairment in the hippocampus of lipin1-deficient mice. As shown in behavioral test, the spatial learning and memory ability of fld mice was much worse than that of wild-type mice. Electron microscopy results showed that the number of synapses in hippocampus of fld mice was significantly reduced. BDNF,SYP, PSD95 were significantly reduced. These results suggest that lipin1 impairs synaptic plasticity. Hence,a deficiency of lipin1 leads to decreased DAG levels and inhibits PKD activation, thereby affecting the phosphorylation of ERK and the CREB.
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Affiliation(s)
- Pan Shang
- School of Medicine,Shandong University, Jinan, Shandong, 250012, China; Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong, 250033, China
| | - Fengjie Zheng
- Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong, 250033, China
| | - Feng Han
- The People's Hospital of Zhangqiu Area, Jinan, Shandong, 250200, China
| | - Yuwen Song
- Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong, 250033, China
| | - Zhe Pan
- Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong, 250033, China
| | - Shuyan Yu
- Department of Physiology, Shandong University, School of Basic Medical Sciences, Jinan, Shandong, 250012, China
| | - Xianghua Zhuang
- Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong, 250033, China.
| | - Shihong Chen
- Department of Endocrinology and Metabolism, The Second Hospital of Shandong University, Jinan, Shandong, 250033, China.
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Lipidomic Analysis of Cells and Extracellular Vesicles from High- and Low-Metastatic Triple-Negative Breast Cancer. Metabolites 2020; 10:metabo10020067. [PMID: 32069969 PMCID: PMC7073695 DOI: 10.3390/metabo10020067] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/02/2020] [Accepted: 02/07/2020] [Indexed: 12/27/2022] Open
Abstract
Extracellular vesicles (EVs) are lipid bilayer nanovesicles secreted from almost all cells including cancer. Cancer-derived EVs contribute to cancer progression and malignancy via educating the surrounding normal cells. In breast cancer, epidemiological and experimental observations indicated that lipids are associated with cancer malignancy. However, lipid compositions of breast cancer EVs and their contributions to cancer progression are unexplored. In this study, we performed a widely targeted quantitative lipidomic analysis in cells and EVs derived from high- and low-metastatic triple-negative breast cancer cell lines, using supercritical fluid chromatography fast-scanning triple-quadrupole mass spectrometry. We demonstrated the differential lipid compositions between EVs and cells of their origin, and between high- and low-metastatic cell lines. Further, we demonstrated EVs from highly metastatic breast cancer accumulated unsaturated diacylglycerols (DGs) compared with EVs from lower-metastatic cells, without increasing the amount in cells. The EVs enriched with DGs could activate the protein kinase D signaling pathway in endothelial cells, which can lead to stimulated angiogenesis. Our results indicate that lipids are selectively loaded into breast cancer EVs to support tumor progression.
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42
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Wang H, Fang J, Chen F, Sun Q, Xu X, Lin SH, Liu K. Metabolomic profile of diabetic retinopathy: a GC-TOFMS-based approach using vitreous and aqueous humor. Acta Diabetol 2020; 57:41-51. [PMID: 31089930 DOI: 10.1007/s00592-019-01363-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/03/2019] [Indexed: 12/12/2022]
Abstract
AIM To identify the potential metabolite markers in diabetic retinopathy (DR) by using gas chromatography coupled with time-of-flight mass spectrometry (GC-TOFMS). METHODS GC-TOFMS spectra were acquired from vitreous and aqueous humor (AH) samples of patients with DR and non-diabetic participants. Comparative analysis was used to elucidate the distinct metabolites of DR. Metabolic pathway was employed to explicate the metabolic reprogramming pathways involved in DR. Logistic regression and receiver-operating characteristic analyses were carried out to select and validate the biomarker metabolites and establish a therapeutic model. RESULTS Comparative analysis showed a clear separation between disease and control groups. Eight differentiating metabolites from AH and 15 differentiating metabolites from vitreous were highlighted. Out of these 23 metabolites, 11 novel metabolites have not been detected previously. Pathway analysis identified nine pathways (three in AH and six in vitreous) as the major disturbed pathways associated with DR. The abnormal of gluconeogenesis, ascorbate-aldarate metabolism, valine-leucine-isoleucine biosynthesis, and arginine-proline metabolism might weigh the most in the development of DR. The AUC of the logistic regression model established by D-2,3-Dihydroxypropanoic acid, isocitric acid, fructose 6-phosphate, and L-Lactic acid in AH was 0.965. The AUC established by pyroglutamic acid and pyruvic acid in vitreous was 0.951. CONCLUSIONS These findings have expanded our understanding of identified metabolites and revealed for the first time some novel metabolites in DR. These results may provide useful information to explore the mechanism and may eventually allow the development of metabolic biomarkers for prognosis and novel therapeutic strategies for the management of DR.
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Affiliation(s)
- Haiyan Wang
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| | - Junwei Fang
- College of Basic Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fenge Chen
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| | - Qian Sun
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| | - Xiaoyin Xu
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| | - Shu-Hai Lin
- College of Basic Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Xiamen, China.
| | - Kun Liu
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China.
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43
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Pemberton JG, Kim YJ, Balla T. Integrated regulation of the phosphatidylinositol cycle and phosphoinositide-driven lipid transport at ER-PM contact sites. Traffic 2019; 21:200-219. [PMID: 31650663 DOI: 10.1111/tra.12709] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/02/2019] [Accepted: 10/16/2019] [Indexed: 12/20/2022]
Abstract
Among the structural phospholipids that form the bulk of eukaryotic cell membranes, phosphatidylinositol (PtdIns) is unique in that it also serves as the common precursor for low-abundance regulatory lipids, collectively referred to as polyphosphoinositides (PPIn). The metabolic turnover of PPIn species has received immense attention because of the essential functions of these lipids as universal regulators of membrane biology and their dysregulation in numerous human pathologies. The diverse functions of PPIn lipids occur, in part, by orchestrating the spatial organization and conformational dynamics of peripheral or integral membrane proteins within defined subcellular compartments. The emerging role of stable contact sites between adjacent membranes as specialized platforms for the coordinate control of ion exchange, cytoskeletal dynamics, and lipid transport has also revealed important new roles for PPIn species. In this review, we highlight the importance of membrane contact sites formed between the endoplasmic reticulum (ER) and plasma membrane (PM) for the integrated regulation of PPIn metabolism within the PM. Special emphasis will be placed on non-vesicular lipid transport during control of the PtdIns biosynthetic cycle as well as toward balancing the turnover of the signaling PPIn species that define PM identity.
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Affiliation(s)
- Joshua G Pemberton
- Section on Molecular Signal Transduction, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health, Bethesda, Maryland
| | - Yeun Ju Kim
- Section on Molecular Signal Transduction, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health, Bethesda, Maryland
| | - Tamas Balla
- Section on Molecular Signal Transduction, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health, Bethesda, Maryland
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44
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Weeber F, Becher A, Seibold T, Seufferlein T, Eiseler T. Concerted regulation of actin polymerization during constitutive secretion by cortactin and PKD2. J Cell Sci 2019; 132:jcs.232355. [PMID: 31727638 DOI: 10.1242/jcs.232355] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 11/07/2019] [Indexed: 12/27/2022] Open
Abstract
Constitutive secretion from the trans-Golgi-network (TGN) is facilitated by a concerted regulation of vesicle biogenesis and fission processes. The protein kinase D family (PKD) has been previously described to enhance vesicle fission by modifying the lipid environment. PKD also phosphorylates the actin regulatory protein cortactin at S298 to impair synergistic actin polymerization. We here report additional functions for PKD2 (also known as PRKD2) and cortactin in the regulation of actin polymerization during the fission of transport carriers from the TGN. Phosphorylation of cortactin at S298 impairs the interaction between WIP (also known as WIPF1) and cortactin. WIP stabilizes the autoinhibited conformation of N-WASP (also known as WASL). This leads to an inhibition of synergistic Arp2/3-complex-dependent actin polymerization at the TGN. PKD2 activity at the TGN is controlled by active CDC42-GTP which directly activates N-WASP, inhibits PKD2 and shifts the balance to non-S298-phosphorylated cortactin, which can in turn sequester WIP from N-WASP. Consequently, synergistic actin polymerization at the TGN and constitutive secretion are enhanced.
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Affiliation(s)
- Florian Weeber
- Department of Internal Medicine I, Ulm University, Albert-Einstein-Allee 23, D-89081 Ulm, Germany
| | - Alexander Becher
- Department of Internal Medicine I, Ulm University, Albert-Einstein-Allee 23, D-89081 Ulm, Germany
| | - Tanja Seibold
- Department of Internal Medicine I, Ulm University, Albert-Einstein-Allee 23, D-89081 Ulm, Germany
| | - Thomas Seufferlein
- Department of Internal Medicine I, Ulm University, Albert-Einstein-Allee 23, D-89081 Ulm, Germany
| | - Tim Eiseler
- Department of Internal Medicine I, Ulm University, Albert-Einstein-Allee 23, D-89081 Ulm, Germany
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45
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Zhang Y, Wang HH, Wan X, Xu Y, Pan MH, Sun SC. Inhibition of protein kinase D disrupts spindle formation and actin assembly during porcine oocyte maturation. Aging (Albany NY) 2019; 10:3736-3744. [PMID: 30555056 PMCID: PMC6326681 DOI: 10.18632/aging.101667] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/15/2018] [Indexed: 12/17/2022]
Abstract
Protein kinase D (PKD) subfamily which includes PKD1, PKD2 and PKD3 is a novel family of serine/threonine kinases. PKD has been widely implicated in the regulation of multiple physiological effects including immune responses, apoptosis and cell proliferation. However, the roles of PKD in oocytes have not been fully clarified. In this study we investigated the regulatory functions of PKD during porcine oocyte maturation. Our results indicated that PKD expressed in porcine oocytes and the inhibition of PKD family activity led to the failure of meiosis resumption and the first polar body extrusion. Further analysis indicated that the spindle assembly and chromosome alignment were disrupted after PKD family inhibition, and this might be through its regulatory role on MAPK phosphorylation. We also found that PKD phosphorylated cofilin for actin assembly, which further affected cortical actin distribution, indicating the roles of PKD family on cytoskeleton. In addition, a decreased expression of PKD in postovulatory aging porcine oocytes was observed, which might connect PKD with cytoskeleton defects in aged oocytes. Taken together, these results suggest that PKD possesses important functions in porcine oocyte maturation by regulating spindle organization and actin assembly.
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Affiliation(s)
- Yu Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Hong-Hui Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiang Wan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yao Xu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Meng-Hao Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
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46
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Li L, Hua L, Fan H, He Y, Xu W, Zhang L, Yang J, Deng F, Zeng F. Interplay of PKD3 with SREBP1 Promotes Cell Growth via Upregulating Lipogenesis in Prostate Cancer Cells. J Cancer 2019; 10:6395-6404. [PMID: 31772672 PMCID: PMC6856730 DOI: 10.7150/jca.31254] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 09/12/2019] [Indexed: 12/26/2022] Open
Abstract
Protein kinase D (PKD) has been implicated in cancer cell survival, proliferation, migration and angiogenesis. However, it is still unknown whether PKD regulates cell proliferation through lipid metabolism in cancer cells. Here we report a novel function of PKD3, a member of PKD family, in regulating of prostate cancer cell proliferation by modulation of SREBP1-mediated de novo lipogenesis. We show that silencing of PKD3 significantly reduces lipid content and expression of the lipogenic genes encoding FASN and ATP-citrate lyase (ACLY). Moreover, endogenous PKD3 interacts with sterol regulatory element binding protein 1(SREBP1) in DU145 cells. Interestingly, PKD3 silencing decreases not only the level of matured-SREBP1 (68KD) but also the binding of SREBP1 to the promoter of fasn gene. In addition, overexpression of SREBP1 reverses the suppression of cell growth caused by PKD3 depletion. Finally, immune-histochemical staining indicate that PKD3 expression is positively correlated with expression of FASN and SREBP1 in prostate cancers. Taken together, these data suggest that targeting PKD3-mediated de novo lipogenesis may be a potential therapeutic approach to block prostate cancer progression.
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Affiliation(s)
- Ling Li
- Department of Clinical Laboratory, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, China
| | - Liang Hua
- Center Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Huihui Fan
- Department of Clinical Laboratory, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, China
| | - Yu He
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Wanfu Xu
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Lin Zhang
- Department of Clinical Laboratory, Foshan women and children hospital, Foshan, China
| | - Jie Yang
- Department of Clinical Laboratory, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, China
| | - Fan Deng
- Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Fangyin Zeng
- Department of Clinical Laboratory, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, China
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Sánchez-de-Diego C, Valer JA, Pimenta-Lopes C, Rosa JL, Ventura F. Interplay between BMPs and Reactive Oxygen Species in Cell Signaling and Pathology. Biomolecules 2019; 9:E534. [PMID: 31561501 PMCID: PMC6843432 DOI: 10.3390/biom9100534] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/12/2019] [Accepted: 09/24/2019] [Indexed: 12/12/2022] Open
Abstract
The integration of cell extrinsic and intrinsic signals is required to maintain appropriate cell physiology and homeostasis. Bone morphogenetic proteins (BMPs) are cytokines that belong to the transforming growth factor-β (TGF-β) superfamily, which play a key role in embryogenesis, organogenesis and regulation of whole-body homeostasis. BMPs interact with membrane receptors that transduce information to the nucleus through SMAD-dependent and independent pathways, including PI3K-AKT and MAPKs. Reactive oxygen species (ROS) are intracellular molecules derived from the partial reduction of oxygen. ROS are highly reactive and govern cellular processes by their capacity to regulate signaling pathways (e.g., NF-κB, MAPKs, KEAP1-NRF2 and PI3K-AKT). Emerging evidence indicates that BMPs and ROS interplay in a number of ways. BMPs stimulate ROS production by inducing NOX expression, while ROS regulate the expression of several BMPs. Moreover, BMPs and ROS influence common signaling pathways, including PI3K/AKT and MAPK. Additionally, dysregulation of BMPs and ROS occurs in several pathologies, including vascular and musculoskeletal diseases, obesity, diabetes and kidney injury. Here, we review the current knowledge on the integration between BMP and ROS signals and its potential applications in the development of new therapeutic strategies.
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Affiliation(s)
- Cristina Sánchez-de-Diego
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Carrer Feixa Llarga s/n, 08907 L'Hospitalet Llobregat, Spain.
| | - José Antonio Valer
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Carrer Feixa Llarga s/n, 08907 L'Hospitalet Llobregat, Spain.
| | - Carolina Pimenta-Lopes
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Carrer Feixa Llarga s/n, 08907 L'Hospitalet Llobregat, Spain.
| | - José Luis Rosa
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Carrer Feixa Llarga s/n, 08907 L'Hospitalet Llobregat, Spain.
- IDIBELL, Avinguda Granvia de l'Hospitalet 199, 08908 L'Hospitalet de Llobregat, Spain.
| | - Francesc Ventura
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Carrer Feixa Llarga s/n, 08907 L'Hospitalet Llobregat, Spain.
- IDIBELL, Avinguda Granvia de l'Hospitalet 199, 08908 L'Hospitalet de Llobregat, Spain.
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48
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Contaifer D, Roberts CH, Kumar NG, Natarajan R, Fisher BJ, Leslie K, Reed J, Toor AA, Wijesinghe DS. A Preliminary Investigation towards the Risk Stratification of Allogeneic Stem Cell Recipients with Respect to the Potential for Development of GVHD via Their Pre-Transplant Plasma Lipid and Metabolic Signature. Cancers (Basel) 2019; 11:E1051. [PMID: 31349646 PMCID: PMC6721383 DOI: 10.3390/cancers11081051] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/12/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022] Open
Abstract
The clinical outcome of allogeneic hematopoietic stem cell transplantation (SCT) may be influenced by the metabolic status of the recipient following conditioning, which in turn may enable risk stratification with respect to the development of transplant-associated complications such as graft vs. host disease (GVHD). To better understand the impact of the metabolic profile of transplant recipients on post-transplant alloreactivity, we investigated the metabolic signature of 14 patients undergoing myeloablative conditioning followed by either human leukocyte antigen (HLA)-matched related or unrelated donor SCT, or autologous SCT. Blood samples were taken following conditioning and prior to transplant on day 0 and the plasma was comprehensively characterized with respect to its lipidome and metabolome via liquid chromatography/mass spectrometry (LCMS) and gas chromatography/mass spectrometry (GCMS). A pro-inflammatory metabolic profile was observed in patients who eventually developed GVHD. Five potential pre-transplant biomarkers, 2-aminobutyric acid, 1-monopalmitin, diacylglycerols (DG 38:5, DG 38:6), and fatty acid FA 20:1 demonstrated high sensitivity and specificity towards predicting post-transplant GVHD. The resulting predictive model demonstrated an estimated predictive accuracy of risk stratification of 100%, with area under the curve of the ROC of 0.995. The likelihood ratio of 1-monopalmitin (infinity), DG 38:5 (6.0), and DG 38:6 (6.0) also demonstrated that a patient with a positive test result for these biomarkers following conditioning and prior to transplant will be at risk of developing GVHD. Collectively, the data suggest the possibility that pre-transplant metabolic signature may be used for risk stratification of SCT recipients with respect to development of alloreactivity.
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Affiliation(s)
- Daniel Contaifer
- Department of Pharmacotherapy and Outcomes Sciences, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Catherine H Roberts
- Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Naren Gajenthra Kumar
- Department of Microbiology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Ramesh Natarajan
- Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Bernard J Fisher
- Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Kevin Leslie
- Department of Physics, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Jason Reed
- Department of Physics, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Amir A Toor
- Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA.
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA.
| | - Dayanjan S Wijesinghe
- Department of Pharmacotherapy and Outcomes Sciences, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA.
- Institute for Structural Biology Drug Discovery and Development (ISB3D), VCU School of Pharmacy, Richmond, VA 23298, USA.
- Da Vinci Center, Virginia Commonwealth University, Richmond, VA 23284, USA.
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49
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Youssef I, Ricort JM. Deciphering the Role of Protein Kinase D1 (PKD1) in Cellular Proliferation. Mol Cancer Res 2019; 17:1961-1974. [PMID: 31311827 DOI: 10.1158/1541-7786.mcr-19-0125] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/05/2019] [Accepted: 07/11/2019] [Indexed: 11/16/2022]
Abstract
Protein kinase D1 (PKD1) is a serine/threonine kinase that belongs to the calcium/calmodulin-dependent kinase family, and is involved in multiple mechanisms implicated in tumor progression such as cell motility, invasion, proliferation, protein transport, and apoptosis. While it is expressed in most tissues in the normal state, PKD1 expression may increase or decrease during tumorigenesis, and its role in proliferation is context-dependent and poorly understood. In this review, we present and discuss the current landscape of studies investigating the role of PKD1 in the proliferation of both cancerous and normal cells. Indeed, as a potential therapeutic target, deciphering whether PKD1 exerts a pro- or antiproliferative effect, and under what conditions, is of paramount importance.
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Affiliation(s)
- Ilige Youssef
- Centre National de la Recherche Scientifique, CNRS UMR_8113, Laboratoire de Biologie et Pharmacologie Appliquée, Cachan, France.,École Normale Supérieure Paris-Saclay, Université Paris-Saclay, Cachan, France
| | - Jean-Marc Ricort
- Centre National de la Recherche Scientifique, CNRS UMR_8113, Laboratoire de Biologie et Pharmacologie Appliquée, Cachan, France. .,École Normale Supérieure Paris-Saclay, Université Paris-Saclay, Cachan, France.,Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, USPC, Université Paris Descartes, Université Paris Diderot, Paris, France
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50
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Tenconi PE, Bermúdez V, Oresti GM, Giusto NM, Salvador GA, Mateos MV. High glucose-induced phospholipase D activity in retinal pigment epithelium cells: New insights into the molecular mechanisms of diabetic retinopathy. Exp Eye Res 2019; 184:243-257. [PMID: 31059692 DOI: 10.1016/j.exer.2019.04.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/05/2019] [Accepted: 04/30/2019] [Indexed: 02/02/2023]
Abstract
Chronic hyperglycemia, oxidative stress and inflammation are key players in the pathogenesis of diabetic retinopathy (DR). In this work we study the role of phospholipase D (PLD) pathway in an in vitro model of high glucose (HG)-induced damage. To this end, we exposed human retinal pigment epithelium (RPE) cell lines (ARPE-19 and D407) to HG concentrations (16.5 or 33 mM) or to normal glucose concentration (NG, 5.5 mM) for 4, 24 or 72 h. Exposure to HG increased reactive oxygen species levels and caspase-3 cleavage and reduced cell viability after 72 h of incubation. In addition, short term HG exposure (4 h) induced the activation of early events, that involve PLD and ERK1/2 signaling, nuclear factor kappa B (NFκB) nuclear translocation and IκB phosphorylation. The increment in pro-inflammatory interleukins (IL-6 and IL-8) and cyclooxygenase-2 (COX-2) mRNA levels was observed after 24 h of HG exposure. The effect of selective pharmacological PLD1 (VU0359595) and PLD2 (VU0285655-1) inhibitors demonstrated that ERK1/2 and NFκB activation were downstream events of both PLD isoforms. The increment in IL-6 and COX-2 mRNA levels induced by HG was reduced to control levels in cells pre-incubated with both PLD inhibitors. Furthermore, the inhibition of PLD1, PLD2 and MEK/ERK pathway prevented the loss of cell viability and the activation of caspase-3 induced by HG. In conclusion, our findings demonstrate that PLD1 and PLD2 mediate the inflammatory response triggered by HG in RPE cells, pointing to their potential use as a therapeutic target for DR treatment.
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Affiliation(s)
- Paula E Tenconi
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000, Bahía, Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), 8000, Bahía, Blanca, Argentina
| | - Vicente Bermúdez
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000, Bahía, Blanca, Argentina
| | - Gerardo M Oresti
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000, Bahía, Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), 8000, Bahía, Blanca, Argentina
| | - Norma M Giusto
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000, Bahía, Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), 8000, Bahía, Blanca, Argentina
| | - Gabriela A Salvador
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000, Bahía, Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), 8000, Bahía, Blanca, Argentina
| | - Melina V Mateos
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 8000, Bahía, Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), 8000, Bahía, Blanca, Argentina.
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