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Ahmed MM, Tazyeen S, Alam A, Farooqui A, Ali R, Imam N, Tamkeen N, Ali S, Malik MZ, Ishrat R. Deciphering key genes in cardio-renal syndrome using network analysis. Bioinformation 2021; 17:86-100. [PMID: 34393423 PMCID: PMC8340714 DOI: 10.6026/97320630017086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/31/2020] [Accepted: 01/26/2021] [Indexed: 12/23/2022] Open
Abstract
Cardio-renal syndrome (CRS) is a rapidly recognized clinical entity which refers to the inextricably connection between heart and renal impairment, whereby abnormality to one organ directly promotes deterioration of the other one. Biological markers help to gain insight into the pathological processes for early diagnosis with higher accuracy of CRS using known clinical findings. Therefore, it is of interest to identify target genes in associated pathways implicated linked to CRS. Hence, 119 CRS genes were extracted from the literature to construct the PPIN network. We used the MCODE tool to generate modules from network so as to select the top 10 modules from 23 available modules. The modules were further analyzed to identify 12 essential genes in the network. These biomarkers are potential emerging tools for understanding the pathophysiologic mechanisms for the early diagnosis of CRS. Ontological analysis shows that they are rich in MF protease binding and endo-peptidase inhibitor activity. Thus, this data help increase our knowledge on CRS to improve clinical management of the disease.
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Affiliation(s)
- Mohd Murshad Ahmed
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Safia Tazyeen
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Aftab Alam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Anam Farooqui
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Rafat Ali
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Nikhat Imam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Naaila Tamkeen
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Shahnawaz Ali
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Md Zubbair Malik
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi-1100067, India
| | - Romana Ishrat
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi-110025, India
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Carlsson E, Supharattanasitthi W, Jackson M, Paraoan L. Increased Rate of Retinal Pigment Epithelial Cell Migration and Pro-Angiogenic Potential Ensuing From Reduced Cystatin C Expression. Invest Ophthalmol Vis Sci 2020; 61:9. [PMID: 32049341 PMCID: PMC7324439 DOI: 10.1167/iovs.61.2.9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Variant B precursor cysteine protease inhibitor cystatin C, a known recessive risk factor for developing exudative age-related macular degeneration (AMD), presents altered intracellular trafficking and reduced secretion from retinal pigment epithelial (RPE) cells. Because cystatin C inhibits multiple extracellular matrix (ECM)-degrading cathepsins, this study evaluated the role of this mutation in inducing ECM-related functional changes in RPE cellular behavior. Methods Induced pluripotent stem cells gene-edited bi-allelically by CRISPR/Cas9 to express the AMD-linked cystatin C variant were differentiated to RPE cells and assayed for their ability to degrade fluorescently labeled ECM proteins. Cellular migration and adhesion on multiple ECM proteins, differences in transepithelial resistance and polarized protein secretion were tested. Vessel formation induced by gene edited cells-conditioned media was quantified using primary human dermal microvascular epithelial cells. Results Variant B cystatin C-expressing induced pluripotent stem cells-derived RPE cells displayed a significantly higher rate of laminin and fibronectin degradation 3 days after seeding on fluorescently labeled ECM (P < 0.05). Migration on matrigel, collagen IV and fibronectin was significantly faster for edited cells compared with wild-type (WT) cells. Both edited and WT cells displayed polarized secretion of cystatin C, but transepithelial resistance was lower in gene-edited cells after 6 weeks culture, with significantly lower expression of tight junction protein claudin-3. Media conditioned by gene-edited cells stimulated formation of significantly longer microvascular tubes (P < 0.05) compared with WT-conditioned media. Conclusions Reduced levels of cystatin C lead to changes in the RPE ability to degrade, adhere, and migrate supporting increased invasiveness and angiogenesis relevant for AMD pathology.
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Yan L, Ding S, Gu B, Ma P. Clinical application of simultaneous detection of cystatin C, cathepsin S, and IL-1 in classification of coronary artery disease. J Biomed Res 2017; 31:315-320. [PMID: 28808203 PMCID: PMC5548992 DOI: 10.7555/jbr.31.20150152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Cystatin C, cathepsin S, and IL-1 are three important biomarkers of atherosclerosis. Previous studies emphasized the relationship between individual biomarkers in coronary artery disease (CAD) patients and severity of atherosclerostic lesions of the coronary arteries, while combined cystatin C, cathepsin S, and IL-1 have not been reported for clinical classification of CAD. We aimed to establish a link between cystatin C, cathepsin S, IL-1 and CAD in this cohort study. Totally 112 subjects were enrolled and divided into the stable angina pectoris group, the unstable angina pectoris group and the acute myocardial infarction (AMI) groups, and 50 healthy adults served as controls. The levels of the three biomarkers were detected by ELISA. The results showed that serum level of cystatin C (mg/L) was higher in CAD patients compared with those in the healthy controls (AMIvs. unstable angina pectoris vs. stable angina pectoris vs. controls: 1.27±0.18 vs. 1.09±0.19 vs. 0.91±0.05 vs. 0.78±0.07, all P<0.01). Cathepsin S (ng/mL) was also significantly different among the groups (AMI vs. unstable angina pectoris vs. stable angina pectoris vs. controls: 67.30±8.36 vs. 56.90±7.16 vs. 49.8±2.72 vs. 67.30±8.36, all P<0.01). IL-1 (pg/mL) was significantly different among the groups as well (AMIvs. unstable angina pectoris vs. stable angina pectoris vs. controls: 2.96±0.57 vs. 2.46±0.24 vs. 2.28±0.09 vs. 2.02±0.13, all P<0.01). Spearman's correlation test revealed positive correlation between cystatin C, cathepsin S, IL-1 and Gensini score (r=0.451, 0.491, 0.397, respectively). It is suggested that simultaneous detection of cystatin C, cathepsin S, and IL-1 in serum may be useful in clinical classification and assessment of severity of CAD.
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Affiliation(s)
- Ling Yan
- Medical Technology Institute of Xuzhou Medical College, Xuzhou, Jiangsu 221004, China
| | - Shuang Ding
- Department of Laboratory Medicine, the Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, China
| | - Bing Gu
- Medical Technology Institute of Xuzhou Medical College, Xuzhou, Jiangsu 221004, China.,Department of Laboratory Medicine, the Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, China
| | - Ping Ma
- Medical Technology Institute of Xuzhou Medical College, Xuzhou, Jiangsu 221004, China.,Department of Laboratory Medicine, the Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu 221002, China
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Zhang J, Wu X, Gao P, Yan P. Correlations of serum cystatin C and glomerular filtration rate with vascular lesions and severity in acute coronary syndrome. BMC Cardiovasc Disord 2017; 17:47. [PMID: 28143410 PMCID: PMC5282728 DOI: 10.1186/s12872-017-0483-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 01/23/2017] [Indexed: 02/06/2023] Open
Abstract
Background The aim of this study was to evaluate the predictive value of cystatin C (CysC) and estimated glomerular filtration rate (eGFR) regarding vascular lesions and their severity in patients with acute coronary syndrome (ACS). Methods According to the results of coronary angiography, 195 ACS patients were divided into a single-vascular-lesion group (91 cases), a dual-vascular-lesion group (67 cases), and a multiple-vascular-lesion group (37 cases) to assess the severity of coronary artery disease according to Gensini scores and to analyze the correlations of CysC and eGFR level with vascular lesions and severity in ACS patients. Results Intergroup comparisons of univariate and multivariate regression analyses showed that CysC was positively correlated with vascular lesions (P < 0.05), but eGFR showed no correlation. Regarding the severity of vascular lesions, CysC was positively correlated with Gensini score (Pearson’s correlation coefficient r = 0.1811, P < 0.05), but eGFR was not correlated (P > 0.05). Conclusions Serum CysC levels could reflect the severity of vascular lesions in ACS patients, and a high CysC level had predictive value regarding the severity of vascular lesions in ACS.
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Affiliation(s)
- Jinjin Zhang
- Department of Cardiology, North Huashan Hospital of Fudan University, Shanghai, 201907, People's Republic of China
| | - Xianhao Wu
- Department of Cardiology, Tongren Hospital, Shanghai, 200050, People's Republic of China
| | - Peizhen Gao
- Department of Beixinjing Community Health Center, Shanghai, 200335, People's Republic of China
| | - Pingping Yan
- Department of Cardiology, North Huashan Hospital of Fudan University, Shanghai, 201907, People's Republic of China.
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Mathews PM, Levy E. Cystatin C in aging and in Alzheimer's disease. Ageing Res Rev 2016; 32:38-50. [PMID: 27333827 DOI: 10.1016/j.arr.2016.06.003] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 06/08/2016] [Accepted: 06/08/2016] [Indexed: 12/13/2022]
Abstract
Under normal conditions, the function of catalytically active proteases is regulated, in part, by their endogenous inhibitors, and any change in the synthesis and/or function of a protease or its endogenous inhibitors may result in inappropriate protease activity. Altered proteolysis as a result of an imbalance between active proteases and their endogenous inhibitors can occur during normal aging, and such changes have also been associated with multiple neuronal diseases, including Amyotrophic Lateral Sclerosis (ALS), rare heritable neurodegenerative disorders, ischemia, some forms of epilepsy, and Alzheimer's disease (AD). One of the most extensively studied endogenous inhibitor is the cysteine-protease inhibitor cystatin C (CysC). Changes in the expression and secretion of CysC in the brain have been described in various neurological disorders and in animal models of neurodegeneration, underscoring a role for CysC in these conditions. In the brain, multiple in vitro and in vivo findings have demonstrated that CysC plays protective roles via pathways that depend upon the inhibition of endosomal-lysosomal pathway cysteine proteases, such as cathepsin B (Cat B), via the induction of cellular autophagy, via the induction of cell proliferation, or via the inhibition of amyloid-β (Aβ) aggregation. We review the data demonstrating the protective roles of CysC under conditions of neuronal challenge and the protective pathways induced by CysC under various conditions. Beyond highlighting the essential role that balanced proteolytic activity plays in supporting normal brain aging, these findings suggest that CysC is a therapeutic candidate that can potentially prevent brain damage and neurodegeneration.
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Affiliation(s)
- Paul M Mathews
- Departments of Psychiatry, New York University School of Medicine, USA; Center for Dementia Research, Nathan S. Kline Institute, Orangeburg, NY 10962, USA
| | - Efrat Levy
- Departments of Psychiatry, New York University School of Medicine, USA; Biochemistry and Molecular Pharmacology, New York University School of Medicine, USA; Center for Dementia Research, Nathan S. Kline Institute, Orangeburg, NY 10962, USA.
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Nguyen A, Hulleman JD. Evidence of Alternative Cystatin C Signal Sequence Cleavage Which Is Influenced by the A25T Polymorphism. PLoS One 2016; 11:e0147684. [PMID: 26845025 PMCID: PMC4741414 DOI: 10.1371/journal.pone.0147684] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 01/07/2016] [Indexed: 11/19/2022] Open
Abstract
Cystatin C (Cys C) is a small, potent, cysteine protease inhibitor. An Ala25Thr (A25T) polymorphism in Cys C has been associated with both macular degeneration and late-onset Alzheimer's disease. Previously, studies have suggested that this polymorphism may compromise the secretion of Cys C. Interestingly, we found that untagged A25T, A25T tagged C-terminally with FLAG, or A25T FLAG followed by green fluorescent protein (GFP), were all secreted as efficiently from immortalized human cells as their wild-type (WT) counterparts (e.g., 112%, 100%, and 88% of WT levels from HEK-293T cells, respectively). Supporting these observations, WT and A25T Cys C variants also showed similar intracellular steady state levels. Furthermore, A25T Cys C did not activate the unfolded protein response and followed the same canonical endoplasmic reticulum (ER)-Golgi trafficking pathway as WT Cys C. WT Cys C has been shown to undergo signal sequence cleavage between residues Gly26 and Ser27. While the A25T polymorphism did not affect Cys C secretion, we hypothesized that it may alter where the Cys C signal sequence is preferentially cleaved. Under normal conditions, WT and A25T Cys C have the same signal sequence cleavage site after Gly26 (referred to as 'site 2' cleavage). However, in particular circumstances when the residues around site 2 are modified (such as by the presence of an N-terminal FLAG tag immediately after Gly26, or by a Gly26Lys (G26K) mutation), A25T has a significantly higher likelihood than WT Cys C of alternative signal sequence cleavage after Ala20 ('site 1') or even earlier in the Cys C sequence. Overall, our results indicate that the A25T polymorphism does not cause a significant reduction in Cys C secretion, but instead predisposes the protein to be cleaved at an alternative signal sequence cleavage site if site 2 is hindered. Additional N-terminal amino acids resulting from alternative signal sequence cleavage may, in turn, affect the protease inhibition function of Cys C.
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Affiliation(s)
- Annie Nguyen
- Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - John D. Hulleman
- Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- * E-mail:
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Nguyen NT, Zhang X, Wu C, Lange RA, Chilton RJ, Lindsey ML, Jin YF. Integrative computational and experimental approaches to establish a post-myocardial infarction knowledge map. PLoS Comput Biol 2014; 10:e1003472. [PMID: 24651374 PMCID: PMC3961365 DOI: 10.1371/journal.pcbi.1003472] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 01/02/2014] [Indexed: 01/04/2023] Open
Abstract
Vast research efforts have been devoted to providing clinical diagnostic markers of myocardial infarction (MI), leading to over one million abstracts associated with “MI” and “Cardiovascular Diseases” in PubMed. Accumulation of the research results imposed a challenge to integrate and interpret these results. To address this problem and better understand how the left ventricle (LV) remodels post-MI at both the molecular and cellular levels, we propose here an integrative framework that couples computational methods and experimental data. We selected an initial set of MI-related proteins from published human studies and constructed an MI-specific protein-protein-interaction network (MIPIN). Structural and functional analysis of the MIPIN showed that the post-MI LV exhibited increased representation of proteins involved in transcriptional activity, inflammatory response, and extracellular matrix (ECM) remodeling. Known plasma or serum expression changes of the MIPIN proteins in patients with MI were acquired by data mining of the PubMed and UniProt knowledgebase, and served as a training set to predict unlabeled MIPIN protein changes post-MI. The predictions were validated with published results in PubMed, suggesting prognosticative capability of the MIPIN. Further, we established the first knowledge map related to the post-MI response, providing a major step towards enhancing our understanding of molecular interactions specific to MI and linking the molecular interaction, cellular responses, and biological processes to quantify LV remodeling. Heart attack, known medically as myocardial infarction, often occurs as a result of partial shortage of blood supply to a portion of the heart, leading to the death of heart muscle cells. Following myocardial infarction, complications might arise, including arrhythmia, myocardial rupture, left ventricular dysfunction, and heart failure. Although myocardial infarction can be quickly diagnosed using a various number of tests, including blood tests and electrocardiography, there have been no available prognostic tests to predict the long-term outcome in response to myocardial infarction. Here, we present a framework to analyze how the left ventricle responds to myocardial infarction by combining protein interactome and experimental results retrieved from published human studies. The framework organized current understanding of molecular interactions specific to myocardial infarction, cellular responses, and biological processes to quantify left ventricular remodeling process. Specifically, our knowledge map showed that transcriptional activity, inflammatory response, and extracellular matrix remodeling are the main functional themes post myocardial infarction. In addition, text analytics of relevant abstracts revealed differentiated protein expressions in plasma or serum expressions from patients with myocardial infarction. Using this data, we predicted expression levels of other proteins following myocardial infarction.
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Affiliation(s)
- Nguyen T. Nguyen
- Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, Texas, United States of America
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
| | - Xiaolin Zhang
- Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, Texas, United States of America
| | - Cathy Wu
- Center for Bioinformatics and Computational Biology and Protein Information Resource, University of Delaware, Newark, Delaware, United States of America
| | - Richard A. Lange
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
- Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
| | - Robert J. Chilton
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
- Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
| | - Merry L. Lindsey
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
- Mississippi Center for Heart Research, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, Mississippi, United States of America
| | - Yu-Fang Jin
- Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, Texas, United States of America
- San Antonio Cardiovascular Proteomics Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
- * E-mail:
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Abstract
Changes in expression and secretion levels of cystatin C (CysC) in the brain in various neurological disorders and in animal models of neurodegeneration underscore a role for CysC in these conditions. A polymorphism in the CysC gene (CST3) is linked to increased risk for Alzheimer's disease (AD). AD pathology is characterized by deposition of oligomeric and fibrillar forms of amyloid β (Aβ) in the neuropil and cerebral vessel walls, neurofibrillary tangles composed mainly of hyperphosphorylated tau, and neurodegeneration. The implication of CysC in AD was initially suggested by its co-localization with Aβ in amyloid-laden vascular walls, and in senile plaque cores of amyloid in the brains of patients with AD, Down's syndrome, hereditary cerebral hemorrhage with amyloidosis, Dutch type (HCHWA-D), and cerebral infarction. CysC also co-localizes with Aβ amyloid deposits in the brains of non-demented aged individuals. Multiple lines of research show that CysC plays protective roles in AD. In vitro studies have shown that CysC binds Aβ and inhibits Aβ oligomerization and fibril formation. In vivo results from the brains and plasma of Aβ-depositing transgenic mice confirmed the association of CysC with the soluble, non-pathological form of Aβ and the inhibition of Aβ plaques formation. The association of CysC with Aβ was also found in brain and in cerebrospinal fluid (CSF) from AD patients and non-demented control individuals. Moreover, in vitro results showed that CysC protects neuronal cells from a variety of insults that may cause cell death, including cell death induced by oligomeric and fibrillar Aβ. These data suggest that the reduced levels of CysC manifested in AD contribute to increased neuronal vulnerability and impaired neuronal ability to prevent neurodegeneration. This review elaborates on the neuroprotective roles of CysC in AD and the clinical relevance of this protein as a therapeutic agent.
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Affiliation(s)
- Gurjinder Kaur
- Departments of Psychiatry, Biochemistry, and Molecular Pharmacology, Center for Dementia Research, Nathan S. Kline Institute, New York University School of Medicine, Orangeburg NY, USA
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Hooton H, Dubern B, Henegar C, Paternoster L, Nohr EA, Alili R, Rousseau F, Pelloux V, Galan P, Hercberg S, Arner P, Sørensen TIA, Clément K. Association between CST3 rs2424577 polymorphism and corpulence related phenotypes during lifetime in populations of European ancestry. Obes Facts 2011; 4:131-44. [PMID: 21577020 PMCID: PMC6444514 DOI: 10.1159/000327797] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Cystatin C, a protein coded by CST3 gene, is implicated in adipose tissue biology. Our hypothesis is that common variants in CST3 gene could play a role in the development of corpulence during lifetime. METHODS Two tag SNPs were selected to capture all SNPs in the CST3 region. We first investigated the association of the two tag SNPs individually and combined into haplotypes with corpulence related phenotypes in 4,288 French subjects (BMI = 24.31 ( 3.74 kg/m²). Significant findings were replicated in five independent populations--790 Danish lean men (BMI = 24.63 ( 2.30 kg/m²), 672 Danish obese men (BMI = 33.23 ( 2.34 kg/m²), 763 Swedish women (BMI = 21.73 ( 2.87 kg/m²), 1,848 Danish lean women (BMI = 22.66 ( 2.85 kg/m²) and 2,061 Danish obese women (BMI = 37.01 ( 3.59 kg/m²). RESULTS Rs2424577 was associated with BMI in three independent populations--G/G carriers were less corpulent than A/A carriers in the French individuals (p = 0.045) and in the Danish lean men (p = 0.021), and they were more corpulent in the group of Swedish women (p = 0.004). This phenomenon has been described as a flip-flop phenomenon, probably caused by a multilocus effect. CONCLUSION CST3 rs2424577 is associated with BMI in a complex fashion. This association is probably caused by the interaction between several functional variants.
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Affiliation(s)
- Henri Hooton
- INSERM U872 Equipe 7, Centre de Recherche des Cordeliers 15 Rue de l’Ecole de Medecine, 75006 Paris, France.
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Tizon B, Sahoo S, Yu H, Gauthier S, Kumar AR, Mohan P, Figliola M, Pawlik M, Grubb A, Uchiyama Y, Bandyopadhyay U, Cuervo AM, Nixon RA, Levy E. Induction of autophagy by cystatin C: a mechanism that protects murine primary cortical neurons and neuronal cell lines. PLoS One 2010; 5:e9819. [PMID: 20352108 PMCID: PMC2843718 DOI: 10.1371/journal.pone.0009819] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 01/14/2010] [Indexed: 12/14/2022] Open
Abstract
Cystatin C (CysC) expression in the brain is elevated in human patients with epilepsy, in animal models of neurodegenerative conditions, and in response to injury, but whether up-regulated CysC expression is a manifestation of neurodegeneration or a cellular repair response is not understood. This study demonstrates that human CysC is neuroprotective in cultures exposed to cytotoxic challenges, including nutritional-deprivation, colchicine, staurosporine, and oxidative stress. While CysC is a cysteine protease inhibitor, cathepsin B inhibition was not required for the neuroprotective action of CysC. Cells responded to CysC by inducing fully functional autophagy via the mTOR pathway, leading to enhanced proteolytic clearance of autophagy substrates by lysosomes. Neuroprotective effects of CysC were prevented by inhibiting autophagy with beclin 1 siRNA or 3-methyladenine. Our findings show that CysC plays a protective role under conditions of neuronal challenge by inducing autophagy via mTOR inhibition and are consistent with CysC being neuroprotective in neurodegenerative diseases. Thus, modulation of CysC expression has therapeutic implications for stroke, Alzheimer's disease, and other neurodegenerative disorders.
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Affiliation(s)
- Belen Tizon
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Susmita Sahoo
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Haung Yu
- Department of Pathology, Taub Institute, Columbia University, New York, New York, United States of America
| | - Sebastien Gauthier
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Asok R. Kumar
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Panaiyur Mohan
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Matthew Figliola
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Monika Pawlik
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
| | - Anders Grubb
- Department of Clinical Chemistry, University Hospital, Lund, Sweden
| | - Yasuo Uchiyama
- Department of Cell Biology and Neuroscience, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Urmi Bandyopadhyay
- Department of Developmental and Molecular Biology and Medicine, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Ana Maria Cuervo
- Department of Developmental and Molecular Biology and Medicine, Albert Einstein College of Medicine, Bronx, New York, United States of America
| | - Ralph A. Nixon
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
- Department of Psychiatry, New York University School of Medicine, New York, New York, United States of America
- Department of Cell Biology, New York University School of Medicine, New York, New York, United States of America
| | - Efrat Levy
- Nathan S. Kline Institute, Orangeburg, New York, United States of America
- Department of Psychiatry, New York University School of Medicine, New York, New York, United States of America
- Department of Pharmacology, New York University School of Medicine, New York, New York, United States of America
- * E-mail:
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Tizon B, Ribe EM, Mi W, Troy CM, Levy E. Cystatin C protects neuronal cells from amyloid-beta-induced toxicity. J Alzheimers Dis 2010; 19:885-94. [PMID: 20157244 PMCID: PMC2889175 DOI: 10.3233/jad-2010-1291] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Multiple studies suggest that cystatin C (CysC) has a role in Alzheimer's disease (AD) and a decrease in CysC secretion is linked to the disease in patients with a polymorphism in the CysC gene. CysC binds amyloid-beta (Abeta) and inhibits formation of Abeta fibrils and oligomers both in vitro and in mouse models of amyloid deposition. Here we studied the effect of CysC on cultured primary hippocampal neurons and a neuronal cell line exposed to either oligomeric or fibrillar cytotoxic forms of Abeta. The extracellular addition of the secreted human CysC together with preformed either oligomeric or fibrillar Abeta increased cell survival. While CysC inhibits Abeta aggregation, it does not dissolve preformed Abeta fibrils or oligomers. Thus, CysC has multiple protective effects in AD, by preventing the formation of the toxic forms of Abeta and by direct protection of neuronal cells from Abeta toxicity. Therapeutic manipulation of CysC levels, resulting in slightly higher concentrations than physiological could protect neuronal cells from cell death in AD.
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Affiliation(s)
- Belen Tizon
- Nathan S. Kline Institute, Orangeburg, NY 10962, USA
| | - Elena M. Ribe
- Departments of Pathology, Cell Biology and Neurology, Taub Center for the Study of Alzheimer's Disease and the Aging Brain, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Weiqian Mi
- Nathan S. Kline Institute, Orangeburg, NY 10962, USA
| | - Carol M. Troy
- Departments of Pathology, Cell Biology and Neurology, Taub Center for the Study of Alzheimer's Disease and the Aging Brain, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Efrat Levy
- Departments of Pharmacology and Psychiatry, New York University School of Medicine, Orangeburg, NY 10962, USA
- Nathan S. Kline Institute, Orangeburg, NY 10962, USA
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Mi W, Jung SS, Yu H, Schmidt SD, Nixon RA, Mathews PM, Tagliavini F, Levy E. Complexes of amyloid-beta and cystatin C in the human central nervous system. J Alzheimers Dis 2009; 18:273-80. [PMID: 19584436 DOI: 10.3233/jad-2009-1147] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A role for cystatin C (CysC) in the pathogenesis of Alzheimer's disease (AD) has been suggested by the genetic linkage of a CysC gene (CST3) polymorphism with late-onset AD, the co-localization of CysC with amyloid-beta (Abeta) in AD brains, and binding of CysC to soluble Abeta in vitro and in mouse models of AD. This study investigates the binding between Abeta and CysC in the human central nervous system. While CysC binding to soluble Abeta was observed in AD patients and controls, a SDS-resistant CysC/Abeta complex was detected exclusively in brains of neuropathologically normal controls, but not in AD cases. The association of CysC with Abeta in brain from control individuals and in cerebrospinal fluid reveals an interaction of these two polypeptides in their soluble form. The association between Abeta and CysC prevented Abeta accumulation and fibrillogenesis in experimental systems, arguing that CysC plays a protective role in the pathogenesis of AD in humans and explains why decreases in CysC concentration caused by the CST3 polymorphism or by specific presenilin 2 mutations can lead to the development of the disease. Thus, enhancing CysC expression or modulating CysC binding to Abeta have important disease-modifying effects, suggesting a novel therapeutic intervention for AD.
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Affiliation(s)
- Weiqian Mi
- Nathan S. Kline Institute, Orangeburg, New York, USA
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Levy E, Jaskolski M, Grubb A. The role of cystatin C in cerebral amyloid angiopathy and stroke: cell biology and animal models. Brain Pathol 2006; 16:60-70. [PMID: 16612983 PMCID: PMC8095742 DOI: 10.1111/j.1750-3639.2006.tb00562.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
A variant of the cysteine protease inhibitor, cystatin C, forms amyloid deposited in the cerebral vasculature of patients with hereditary cerebral hemorrhage with amyloidosis, Icelandic type (HCHWA-I), leading to cerebral hemorrhages early in life. However, cystatin C is also implicated in neuronal degenerative diseases in which it does not form the amyloid protein, such as Alzheimer disease (AD). Accumulating data suggest involvement of cystatin C in the pathogenic processes leading to amyloid deposition in cerebral vasculature and most significantly to cerebral hemorrhage in patients with cerebral amyloid angiopathy (CAA). This review focuses on cell culture and animal models used to study the role of cystatin C in these processes.
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Affiliation(s)
- Efrat Levy
- Department of Psychiatry, New York University School of Medicine, and Nathan Kline Institute, Orangeburg 10962, USA.
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