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  1. Article ; Online: Epidemiology, healthcare utilization, and related costs among patients with IPF: results from a German claims database analysis.

    Kreuter, Michael / Picker, Nils / Schwarzkopf, Larissa / Baumann, Severin / Cerani, Agustin / Postema, Roelien / Maywald, Ulf / Dittmar, Axel / Langley, Jonathan / Patel, Haridarshan

    Respiratory research

    2022  Volume 23, Issue 1, Page(s) 62

    Abstract: Background: Idiopathic pulmonary fibrosis (IPF) is a progressive form of fibrosing interstitial pneumonia with poor survival. This study provides insight into the epidemiology, cost, and disease course of IPF in Germany.: Methods: A cohort of ... ...

    Abstract Background: Idiopathic pulmonary fibrosis (IPF) is a progressive form of fibrosing interstitial pneumonia with poor survival. This study provides insight into the epidemiology, cost, and disease course of IPF in Germany.
    Methods: A cohort of incident patients with IPF (n = 1737) was identified from German claims data (2014-2019). Incidence and prevalence rates were calculated and adjusted for age differences compared with the overall German population. All-cause and IPF-related healthcare resource utilization as well as associated costs were evaluated per observed person-year (PY) following the initial IPF diagnosis. Finally, Kaplan-Meier analyses were performed to assess time from initial diagnosis to disease deterioration (using three proxy measures: non-elective hospitalization, IPF-related hospitalization, long-term oxygen therapy [LTOT]); antifibrotic therapy initiation; and all-cause death.
    Results: The cumulative incidence of IPF was estimated at 10.7 per 100,000 individuals in 2016, 10.9 in 2017, 10.5 in 2018, and 9.6 in 2019. The point prevalence rates per 100,000 individuals for the respective years were 21.7, 23.5, 24.1, and 24.1. On average, ≥ 14 physician visits and nearly two hospitalizations per PY were observed after the initial IPF diagnosis. Of total all-cause direct costs (€15,721/PY), 55.7% (€8754/PY) were due to hospitalizations and 29.1% (€4572/PY) were due to medication. Medication accounted for 49.4% (€1470/PY) and hospitalizations for 34.8% (€1034/PY) of total IPF-related direct costs (€2973/PY). Within 2 years of the initial IPF diagnosis (23.6 months), 25% of patients died. Within 5 years of diagnosis, 53.1% of patients had initiated LTOT; only 11.6% were treated with antifibrotic agents. The median time from the initial diagnosis to the first non-elective hospitalization was 5.5 months.
    Conclusion: The incidence and prevalence of IPF in Germany are at the higher end of the range reported in the literature. The main driver for all-cause cost was hospitalization. IPF-related costs were mainly driven by medication, with antifibrotic agents accounting for around one-third of the total medication costs even if not frequently prescribed. Most patients with IPF do not receive pharmacological treatment, highlighting the existing unmet medical need for effective and well-tolerated therapies.
    MeSH term(s) Aged ; Antifibrotic Agents/therapeutic use ; Databases, Factual ; Disease Progression ; Female ; Germany/epidemiology ; Hospitalization/economics ; Hospitalization/statistics & numerical data ; Humans ; Idiopathic Pulmonary Fibrosis/economics ; Idiopathic Pulmonary Fibrosis/epidemiology ; Idiopathic Pulmonary Fibrosis/therapy ; Incidence ; Male ; Oxygen Inhalation Therapy/economics ; Oxygen Inhalation Therapy/statistics & numerical data ; Patient Acceptance of Health Care/statistics & numerical data ; Prevalence ; Retrospective Studies
    Chemical Substances Antifibrotic Agents
    Language English
    Publishing date 2022-03-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041675-1
    ISSN 1465-993X ; 1465-993X
    ISSN (online) 1465-993X
    ISSN 1465-993X
    DOI 10.1186/s12931-022-01976-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Genetically increased circulating FUT3 level leads to reduced risk of idiopathic pulmonary fibrosis: a Mendelian randomisation study.

    Nakanishi, Tomoko / Cerani, Agustin / Forgetta, Vincenzo / Zhou, Sirui / Allen, Richard J / Leavy, Olivia C / Koido, Masaru / Assayag, Deborah / Jenkins, R Gisli / Wain, Louise V / Yang, Ivana V / Lathrop, G Mark / Wolters, Paul J / Schwartz, David A / Richards, J Brent

    The European respiratory journal

    2022  Volume 59, Issue 2

    Abstract: Background: Idiopathic pulmonary fibrosis (IPF) is a progressive, fatal fibrotic interstitial lung disease. Few circulating biomarkers have been identified to have causal effects on IPF.: Methods: To identify candidate IPF-influencing circulating ... ...

    Abstract Background: Idiopathic pulmonary fibrosis (IPF) is a progressive, fatal fibrotic interstitial lung disease. Few circulating biomarkers have been identified to have causal effects on IPF.
    Methods: To identify candidate IPF-influencing circulating proteins, we undertook an efficient screen of circulating proteins by applying a two-sample Mendelian randomisation (MR) approach with existing publicly available data. For instruments, we used genetic determinants of circulating proteins which reside
    Results: MR analyses of 834 proteins found that a 1 sd increase in circulating galactoside 3(4)-l-fucosyltransferase (FUT3) and α-(1,3)-fucosyltransferase 5 (FUT5) was associated with a reduced risk of IPF (OR 0.81, 95% CI 0.74-0.88; p=6.3×10
    Conclusions: An efficient MR scan of 834 circulating proteins provided evidence that genetically increased circulating FUT3 level is associated with reduced risk of IPF.
    MeSH term(s) Fucosyltransferases/genetics ; Genome-Wide Association Study ; Humans ; Idiopathic Pulmonary Fibrosis/genetics ; Mendelian Randomization Analysis/methods ; Polymorphism, Single Nucleotide
    Chemical Substances Fucosyltransferases (EC 2.4.1.-)
    Language English
    Publishing date 2022-02-10
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 639359-7
    ISSN 1399-3003 ; 0903-1936
    ISSN (online) 1399-3003
    ISSN 0903-1936
    DOI 10.1183/13993003.03979-2020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Genetic predisposition to increased serum calcium, bone mineral density, and fracture risk in individuals with normal calcium levels: mendelian randomisation study.

    Cerani, Agustin / Zhou, Sirui / Forgetta, Vincenzo / Morris, John A / Trajanoska, Katerina / Rivadeneira, Fernando / Larsson, Susanna C / Michaëlsson, Karl / Richards, J Brent

    BMJ (Clinical research ed.)

    2019  Volume 366, Page(s) l4410

    Abstract: Objective: To determine if genetically increased serum calcium levels are associated with improved bone mineral density and a reduction in osteoporotic fractures.: Design: Mendelian randomisation study.: Setting: Cohorts used included: the UK ... ...

    Abstract Objective: To determine if genetically increased serum calcium levels are associated with improved bone mineral density and a reduction in osteoporotic fractures.
    Design: Mendelian randomisation study.
    Setting: Cohorts used included: the UK Biobank cohort, providing genotypic and estimated bone mineral density data; 25 cohorts from UK, USA, Europe, and China, providing genotypic and fracture data; and 17 cohorts from Europe, providing genotypic and serum calcium data (summary level statistics).
    Participants: A genome-wide association meta-analysis of serum calcium levels in up to 61 079 individuals was used to identify genetic determinants of serum calcium levels. The UK Biobank study was used to assess the association of genetic predisposition to increased serum calcium with estimated bone mineral density derived from heel ultrasound in 426 824 individuals who had, on average, calcium levels in the normal range. A fracture genome-wide association meta-analysis comprising 24 cohorts and the UK Biobank including a total of 76 549 cases and 470 164 controls, who, on average, also had calcium levels in the normal range was then performed.
    Results: A standard deviation increase in genetically derived serum calcium (0.13 mmol/L or 0.51 mg/dL) was not associated with increased estimated bone mineral density (0.003 g/cm
    Conclusions: Genetic predisposition to increased serum calcium levels in individuals with normal calcium levels is not associated with an increase in estimated bone mineral density and does not provide clinically relevant protection against fracture. Whether such predisposition mimics the effect of short term calcium supplementation is not known. Given that the same genetically derived increase in serum calcium is associated with an increased risk of coronary artery disease, widespread calcium supplementation in the general population could provide more risk than benefit.
    MeSH term(s) Adenosine Triphosphatases/genetics ; Bone Density/genetics ; Calcium/blood ; Diacylglycerol Kinase/genetics ; Female ; GATA3 Transcription Factor/genetics ; Genetic Predisposition to Disease ; Genome-Wide Association Study ; Genotype ; Humans ; Male ; Mendelian Randomization Analysis ; Osteoporotic Fractures/blood ; Osteoporotic Fractures/genetics ; Polymorphism, Single Nucleotide ; Receptors, Calcium-Sensing/genetics ; Risk Assessment ; Vitamin D3 24-Hydroxylase/genetics ; Vitamin K Epoxide Reductases/genetics
    Chemical Substances CASR protein, human ; GATA3 Transcription Factor ; GATA3 protein, human ; Receptors, Calcium-Sensing ; CYP24A1 protein, human (EC 1.14.15.16) ; Vitamin D3 24-Hydroxylase (EC 1.14.15.16) ; VKORC1L1 protein, human (EC 1.17.4.4) ; Vitamin K Epoxide Reductases (EC 1.17.4.4) ; DGKD protein, human (EC 2.7.1.107) ; DGKK protein, human (EC 2.7.1.107) ; Diacylglycerol Kinase (EC 2.7.1.107) ; Adenosine Triphosphatases (EC 3.6.1.-) ; VWA8 protein, human (EC 3.6.1.3) ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2019-08-01
    Publishing country England
    Document type Journal Article ; Meta-Analysis ; Research Support, Non-U.S. Gov't
    ZDB-ID 1362901-3
    ISSN 1756-1833 ; 0959-8154 ; 0959-8146 ; 0959-8138 ; 0959-535X ; 1759-2151
    ISSN (online) 1756-1833
    ISSN 0959-8154 ; 0959-8146 ; 0959-8138 ; 0959-535X ; 1759-2151
    DOI 10.1136/bmj.l4410
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Genomic atlas of the plasma metabolome prioritizes metabolites implicated in human diseases.

    Chen, Yiheng / Lu, Tianyuan / Pettersson-Kymmer, Ulrika / Stewart, Isobel D / Butler-Laporte, Guillaume / Nakanishi, Tomoko / Cerani, Agustin / Liang, Kevin Y H / Yoshiji, Satoshi / Willett, Julian Daniel Sunday / Su, Chen-Yang / Raina, Parminder / Greenwood, Celia M T / Farjoun, Yossi / Forgetta, Vincenzo / Langenberg, Claudia / Zhou, Sirui / Ohlsson, Claes / Richards, J Brent

    Nature genetics

    2023  Volume 55, Issue 1, Page(s) 44–53

    Abstract: Metabolic processes can influence disease risk and provide therapeutic targets. By conducting genome-wide association studies of 1,091 blood metabolites and 309 metabolite ratios, we identified associations with 690 metabolites at 248 loci and ... ...

    Abstract Metabolic processes can influence disease risk and provide therapeutic targets. By conducting genome-wide association studies of 1,091 blood metabolites and 309 metabolite ratios, we identified associations with 690 metabolites at 248 loci and associations with 143 metabolite ratios at 69 loci. Integrating metabolite-gene and gene expression information identified 94 effector genes for 109 metabolites and 48 metabolite ratios. Using Mendelian randomization (MR), we identified 22 metabolites and 20 metabolite ratios having estimated causal effect on 12 traits and diseases, including orotate for estimated bone mineral density, α-hydroxyisovalerate for body mass index and ergothioneine for inflammatory bowel disease and asthma. We further measured the orotate level in a separate cohort and demonstrated that, consistent with MR, orotate levels were positively associated with incident hip fractures. This study provides a valuable resource describing the genetic architecture of metabolites and delivers insights into their roles in common diseases, thereby offering opportunities for therapeutic targets.
    MeSH term(s) Humans ; Genome-Wide Association Study ; Metabolome/genetics ; Phenotype ; Bone Density/genetics ; Genomics ; Polymorphism, Single Nucleotide/genetics
    Language English
    Publishing date 2023-01-12
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1108734-1
    ISSN 1546-1718 ; 1061-4036
    ISSN (online) 1546-1718
    ISSN 1061-4036
    DOI 10.1038/s41588-022-01270-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Assessment of vascular regeneration in the cns using the mouse retina

    Miloudi, Khalil / Dejda, Agnieszka / Binet, François / Lapalme, Eric / Cerani, Agustin / Sapieha, Przemyslaw

    Journal of visualized experiments. 2014 June 23, , no. 88

    2014  

    Abstract: The rodent retina is perhaps the most accessible mammalian system in which to investigate neurovascular interplay within the central nervous system (CNS). It is increasingly being recognized that several neurodegenerative diseases such as Alzheimer’s, ... ...

    Abstract The rodent retina is perhaps the most accessible mammalian system in which to investigate neurovascular interplay within the central nervous system (CNS). It is increasingly being recognized that several neurodegenerative diseases such as Alzheimer’s, multiple sclerosis, and amyotrophic lateral sclerosis present elements of vascular compromise. In addition, the most prominent causes of blindness in pediatric and working age populations (retinopathy of prematurity and diabetic retinopathy, respectively) are characterized by vascular degeneration and failure of physiological vascular regrowth. The aim of this technical paper is to provide a detailed protocol to study CNS vascular regeneration in the retina. The method can be employed to elucidate molecular mechanisms that lead to failure of vascular growth after ischemic injury. In addition, potential therapeutic modalities to accelerate and restore healthy vascular plexuses can be explored. Findings obtained using the described approach may provide therapeutic avenues for ischemic retinopathies such as that of diabetes or prematurity and possibly benefit other vascular disorders of the CNS.
    Keywords amyotrophic lateral sclerosis ; blindness ; central nervous system ; diabetic retinopathy ; mice ; premature birth ; regrowth ; retina ; sclerosis ; therapeutics
    Language English
    Dates of publication 2014-0623
    Size p. e51351.
    Publishing place Journal of Visualized Experiments
    Document type Article
    ZDB-ID 2259946-0
    ISSN 1940-087X
    ISSN 1940-087X
    DOI 10.3791/51351
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Assessment of vascular regeneration in the CNS using the mouse retina.

    Miloudi, Khalil / Dejda, Agnieszka / Binet, François / Lapalme, Eric / Cerani, Agustin / Sapieha, Przemyslaw

    Journal of visualized experiments : JoVE

    2014  , Issue 88, Page(s) e51351

    Abstract: The rodent retina is perhaps the most accessible mammalian system in which to investigate neurovascular interplay within the central nervous system (CNS). It is increasingly being recognized that several neurodegenerative diseases such as Alzheimer's, ... ...

    Abstract The rodent retina is perhaps the most accessible mammalian system in which to investigate neurovascular interplay within the central nervous system (CNS). It is increasingly being recognized that several neurodegenerative diseases such as Alzheimer's, multiple sclerosis, and amyotrophic lateral sclerosis present elements of vascular compromise. In addition, the most prominent causes of blindness in pediatric and working age populations (retinopathy of prematurity and diabetic retinopathy, respectively) are characterized by vascular degeneration and failure of physiological vascular regrowth. The aim of this technical paper is to provide a detailed protocol to study CNS vascular regeneration in the retina. The method can be employed to elucidate molecular mechanisms that lead to failure of vascular growth after ischemic injury. In addition, potential therapeutic modalities to accelerate and restore healthy vascular plexuses can be explored. Findings obtained using the described approach may provide therapeutic avenues for ischemic retinopathies such as that of diabetes or prematurity and possibly benefit other vascular disorders of the CNS.
    MeSH term(s) Animals ; Brain Ischemia/physiopathology ; Disease Models, Animal ; Mice ; Neovascularization, Pathologic/physiopathology ; Nerve Regeneration/physiology ; Oxygen ; Retina/drug effects ; Retina/pathology ; Retina/physiopathology ; Retinal Diseases/physiopathology ; Retinal Vessels/pathology
    Chemical Substances Oxygen (S88TT14065)
    Language English
    Publishing date 2014-06-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Video-Audio Media
    ZDB-ID 2259946-0
    ISSN 1940-087X ; 1940-087X
    ISSN (online) 1940-087X
    ISSN 1940-087X
    DOI 10.3791/51351
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Metabolomic Pathways to Osteoporosis in Middle-Aged Women: A Genome-Metabolome-Wide Mendelian Randomization Study.

    Moayyeri, Alireza / Cheung, Ching-Lung / Tan, Kathryn Cb / Morris, John A / Cerani, Agustin / Mohney, Robert P / Richards, J Brent / Hammond, Christopher / Spector, Tim D / Menni, Cristina

    Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research

    2018  Volume 33, Issue 4, Page(s) 643–650

    Abstract: The metabolic state of the body can be a major determinant of bone health. We used a Mendelian randomization approach to identify metabolites causally associated with bone mass to better understand the biological mechanisms of osteoporosis. We tested ... ...

    Abstract The metabolic state of the body can be a major determinant of bone health. We used a Mendelian randomization approach to identify metabolites causally associated with bone mass to better understand the biological mechanisms of osteoporosis. We tested bone phenotypes (femoral neck, total hip, and lumbar spine bone mineral density [BMD]) for association with 280 fasting blood metabolites in 6055 women from TwinsUK cohort with genomewide genotyping scans. Causal associations between metabolites and bone phenotypes were further assessed in a bidirectional Mendelian randomization study using genetic markers/scores as instrumental variables. Significant associations were replicated in 624 participants from the Hong Kong Osteoporosis Study (HKOS). Fifteen metabolites showed direct associations with bone phenotypes after adjusting for covariates and multiple testing. Using genetic instruments, four of these metabolites were found to be causally associated with hip or spine BMD. These included androsterone sulfate, epiandrosterone sulfate, 5alpha-androstan-3beta17beta-diol disulfate (encoded by CYP3A5), and 4-androsten-3beta17beta-diol disulfate (encoded by SULT2A1). In the HKOS population, all four metabolites showed significant associations with hip and spine BMD in the expected directions. No causal reverse association between BMD and any of the metabolites were found. In the first metabolome-genomewide Mendelian randomization study of human bone mineral density, we identified four novel biomarkers causally associated with BMD. Our findings reveal novel biological pathways involved in the pathogenesis of osteoporosis. © 2017 American Society for Bone and Mineral Research.
    MeSH term(s) Adult ; Aged ; Bone Density/genetics ; Cytochrome P-450 CYP3A/genetics ; Cytochrome P-450 CYP3A/metabolism ; Female ; Humans ; Male ; Mendelian Randomization Analysis ; Metabolome ; Middle Aged ; Osteoporosis/genetics ; Osteoporosis/metabolism ; Sulfotransferases/genetics ; Sulfotransferases/metabolism
    Chemical Substances CYP3A5 protein, human (EC 1.14.14.1) ; Cytochrome P-450 CYP3A (EC 1.14.14.1) ; Sulfotransferases (EC 2.8.2.-) ; alcohol sulfotransferase (EC 2.8.2.2)
    Language English
    Publishing date 2018-01-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Twin Study
    ZDB-ID 632783-7
    ISSN 1523-4681 ; 0884-0431
    ISSN (online) 1523-4681
    ISSN 0884-0431
    DOI 10.1002/jbmr.3358
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  8. Article ; Online: Circulating Isovalerylcarnitine and Lung Cancer Risk: Evidence from Mendelian Randomization and Prediagnostic Blood Measurements.

    Smith-Byrne, Karl / Cerani, Agustin / Guida, Florence / Zhou, Sirui / Agudo, Antonio / Aleksandrova, Krasimira / Barricarte, Aurelio / Barranco, Miguel Rodríguez / Bochers, Christoph H / Gram, Inger Torhild / Han, Jun / Amos, Christopher I / Hung, Rayjean J / Grankvist, Kjell / Nøst, Therese Haugdhal / Imaz, Liher / Chirlaque-López, María Dolores / Johansson, Mikael / Kaaks, Rudolf /
    Kühn, Tilman / Martin, Richard M / McKay, James D / Pala, Valeria / Robbins, Hilary A / Sandanger, Torkjel M / Schibli, David / Schulze, Matthias B / Travis, Ruth C / Vineis, Paolo / Weiderpass, Elisabete / Brennan, Paul / Johansson, Mattias / Richards, J Brent

    Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology

    2022  Volume 31, Issue 10, Page(s) 1966–1974

    Abstract: Background: Tobacco exposure causes 8 of 10 lung cancers, and identifying additional risk factors is challenging due to confounding introduced by smoking in traditional observational studies.: Materials and methods: We used Mendelian randomization ( ... ...

    Abstract Background: Tobacco exposure causes 8 of 10 lung cancers, and identifying additional risk factors is challenging due to confounding introduced by smoking in traditional observational studies.
    Materials and methods: We used Mendelian randomization (MR) to screen 207 metabolites for their role in lung cancer predisposition using independent genome-wide association studies (GWAS) of blood metabolite levels (n = 7,824) and lung cancer risk (n = 29,266 cases/56,450 controls). A nested case-control study (656 cases and 1,296 matched controls) was subsequently performed using prediagnostic blood samples to validate MR association with lung cancer incidence data from population-based cohorts (EPIC and NSHDS).
    Results: An MR-based scan of 207 circulating metabolites for lung cancer risk identified that blood isovalerylcarnitine (IVC) was associated with a decreased odds of lung cancer after accounting for multiple testing (log10-OR = 0.43; 95% CI, 0.29-0.63). Molar measurement of IVC in prediagnostic blood found similar results (log10-OR = 0.39; 95% CI, 0.21-0.72). Results were consistent across lung cancer subtypes.
    Conclusions: Independent lines of evidence support an inverse association of elevated circulating IVC with lung cancer risk through a novel methodologic approach that integrates genetic and traditional epidemiology to efficiently identify novel cancer biomarkers.
    Impact: Our results find compelling evidence in favor of a protective role for a circulating metabolite, IVC, in lung cancer etiology. From the treatment of a Mendelian disease, isovaleric acidemia, we know that circulating IVC is modifiable through a restricted protein diet or glycine and L-carnatine supplementation. IVC may represent a modifiable and inversely associated biomarker for lung cancer.
    MeSH term(s) Biomarkers, Tumor/genetics ; Carnitine/analogs & derivatives ; Case-Control Studies ; Genome-Wide Association Study ; Glycine/genetics ; Humans ; Lung Neoplasms/epidemiology ; Lung Neoplasms/genetics ; Mendelian Randomization Analysis/methods ; Polymorphism, Single Nucleotide ; Risk Factors
    Chemical Substances Biomarkers, Tumor ; 3-methylbutyrylcarnitine (31023-24-2) ; Carnitine (S7UI8SM58A) ; Glycine (TE7660XO1C)
    Language English
    Publishing date 2022-08-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 1153420-5
    ISSN 1538-7755 ; 1055-9965
    ISSN (online) 1538-7755
    ISSN 1055-9965
    DOI 10.1158/1055-9965.EPI-21-1033
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Truncated netrin-1 contributes to pathological vascular permeability in diabetic retinopathy.

    Miloudi, Khalil / Binet, François / Wilson, Ariel / Cerani, Agustin / Oubaha, Malika / Menard, Catherine / Henriques, Sullivan / Mawambo, Gaelle / Dejda, Agnieszka / Nguyen, Phuong Trang / Rezende, Flavio A / Bourgault, Steve / Kennedy, Timothy E / Sapieha, Przemyslaw

    The Journal of clinical investigation

    2016  Volume 126, Issue 8, Page(s) 3006–3022

    Abstract: Diabetic retinopathy (DR) is a major complication of diabetes and a leading cause of blindness in the working-age population. Impaired blood-retinal barrier function leads to macular edema that is closely associated with the deterioration of central ... ...

    Abstract Diabetic retinopathy (DR) is a major complication of diabetes and a leading cause of blindness in the working-age population. Impaired blood-retinal barrier function leads to macular edema that is closely associated with the deterioration of central vision. We previously demonstrated that the neuronal guidance cue netrin-1 activates a program of reparative angiogenesis in microglia within the ischemic retina. Here, we provide evidence in both vitreous humor of diabetic patients and in retina of a murine model of diabetes that netrin-1 is metabolized into a bioactive fragment corresponding to domains VI and V of the full-length molecule. In contrast to the protective effects of full-length netrin-1 on retinal microvasculature, the VI-V fragment promoted vascular permeability through the uncoordinated 5B (UNC5B) receptor. The collagenase matrix metalloprotease 9 (MMP-9), which is increased in patients with diabetic macular edema, was capable of cleaving netrin-1 into the VI-V fragment. Thus, MMP-9 may release netrin-1 fragments from the extracellular matrix and facilitate diffusion. Nonspecific inhibition of collagenases or selective inhibition of MMP-9 decreased pathological vascular permeability in a murine model of diabetic retinal edema. This study reveals that netrin-1 degradation products are capable of modulating vascular permeability, suggesting that these fragments are of potential therapeutic interest for the treatment of DR.
    MeSH term(s) Aged ; Aged, 80 and over ; Animals ; Blood-Retinal Barrier ; Capillary Permeability ; Case-Control Studies ; Diabetes Mellitus, Experimental ; Diabetic Retinopathy/genetics ; Diabetic Retinopathy/metabolism ; Disease Models, Animal ; Humans ; Macular Edema/metabolism ; Matrix Metalloproteinase 9/metabolism ; Mice ; Mice, Inbred C57BL ; Microglia/metabolism ; Middle Aged ; Nerve Growth Factors/genetics ; Nerve Growth Factors/metabolism ; Netrin-1 ; Protein Domains ; Retina/metabolism ; Streptozocin ; Tumor Suppressor Proteins/genetics ; Tumor Suppressor Proteins/metabolism
    Chemical Substances NTN1 protein, human ; Nerve Growth Factors ; Ntn1 protein, mouse ; Tumor Suppressor Proteins ; Netrin-1 (158651-98-0) ; Streptozocin (5W494URQ81) ; MMP9 protein, human (EC 3.4.24.35) ; Matrix Metalloproteinase 9 (EC 3.4.24.35)
    Language English
    Publishing date 2016--01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3067-3
    ISSN 1558-8238 ; 0021-9738
    ISSN (online) 1558-8238
    ISSN 0021-9738
    DOI 10.1172/JCI84767
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  10. Article ; Online: NOTCH1 signaling induces pathological vascular permeability in diabetic retinopathy.

    Miloudi, Khalil / Oubaha, Malika / Ménard, Catherine / Dejda, Agnieszka / Guber, Vera / Cagnone, Gael / Wilson, Ariel M / Tétreault, Nicolas / Mawambo, Gaëlle / Binet, Francois / Chidiac, Rony / Delisle, Chantal / Buscarlet, Manuel / Cerani, Agustin / Crespo-Garcia, Sergio / Bentley, Katie / Rezende, Flavio / Joyal, Jean-Sebastien / Mallette, Frédérick A /
    Gratton, Jean-Philippe / Larrivée, Bruno / Sapieha, Przemyslaw

    Proceedings of the National Academy of Sciences of the United States of America

    2019  Volume 116, Issue 10, Page(s) 4538–4547

    Abstract: Diabetic macular edema is a major complication of diabetes resulting in loss of central vision. Although heightened vessel leakiness has been linked to glial and neuronal-derived factors, relatively little is known on the mechanisms by which mature ... ...

    Abstract Diabetic macular edema is a major complication of diabetes resulting in loss of central vision. Although heightened vessel leakiness has been linked to glial and neuronal-derived factors, relatively little is known on the mechanisms by which mature endothelial cells exit from a quiescent state and compromise barrier function. Here we report that endothelial NOTCH1 signaling in mature diabetic retinas contributes to increased vascular permeability. By providing both human and mouse data, we show that NOTCH1 ligands JAGGED1 and DELTA LIKE-4 are up-regulated secondary to hyperglycemia and activate both canonical and rapid noncanonical NOTCH1 pathways that ultimately disrupt endothelial adherens junctions in diabetic retinas by causing dissociation of vascular endothelial-cadherin from β-catenin. We further demonstrate that neutralization of NOTCH1 ligands prevents diabetes-induced retinal edema. Collectively, these results identify a fundamental process in diabetes-mediated vascular permeability and provide translational rational for targeting the NOTCH pathway (primarily JAGGED1) in conditions characterized by compromised vascular barrier function.
    MeSH term(s) Adaptor Proteins, Signal Transducing/biosynthesis ; Animals ; Antigens, CD/metabolism ; Cadherins/metabolism ; Calcium-Binding Proteins/biosynthesis ; Capillary Permeability ; Diabetic Retinopathy/pathology ; Enzyme Activation ; Hyperglycemia/metabolism ; Jagged-1 Protein/biosynthesis ; Mice ; Nitric Oxide/biosynthesis ; Receptor, Notch1/metabolism ; Retinal Vessels/metabolism ; Signal Transduction ; Vascular Endothelial Growth Factor Receptor-2/metabolism ; src-Family Kinases/metabolism
    Chemical Substances Adaptor Proteins, Signal Transducing ; Antigens, CD ; Cadherins ; Calcium-Binding Proteins ; DLL4 protein, mouse ; Jag1 protein, mouse ; Jagged-1 Protein ; Notch1 protein, mouse ; Receptor, Notch1 ; cadherin 5 ; Nitric Oxide (31C4KY9ESH) ; Vascular Endothelial Growth Factor Receptor-2 (EC 2.7.10.1) ; src-Family Kinases (EC 2.7.10.2)
    Language English
    Publishing date 2019-02-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.1814711116
    Database MEDical Literature Analysis and Retrieval System OnLINE

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