12 results on '"Messias-Reason, Iara J. T."'
Search Results
2. Mannose binding lectin and susceptibility to rheumatoid arthritis in Brazilian patients and their relatives
- Author
-
Goeldner, Isabela, Skare, Thelma L., Utiyama, Shirley R., Nisihara, Renato M., van Tong, Hoang, Messias-Reason, Iara J. T., and Velavan, Thirumalaisamy P.
- Subjects
Adult ,Male ,Adolescent ,Immunology ,lcsh:Medicine ,Rheumatoid Arthritis ,Autoimmunity ,chemical and pharmacologic phenomena ,Mannose-Binding Lectin ,Autoimmune Diseases ,Arthritis, Rheumatoid ,Cohort Studies ,Young Adult ,Genetics ,Genetics of the Immune System ,Medicine and Health Sciences ,Humans ,Family ,Genetic Predisposition to Disease ,Child ,lcsh:Science ,Genetic Association Studies ,Alleles ,Aged ,Aged, 80 and over ,Evolutionary Biology ,lcsh:R ,Biology and Life Sciences ,Human Genetics ,Middle Aged ,bacterial infections and mycoses ,Haplotypes ,Case-Control Studies ,Mutation ,Clinical Immunology ,Female ,lcsh:Q ,Disease Susceptibility ,Population Genetics ,Brazil ,Research Article - Abstract
INTRODUCTION: Rheumatoid arthritis (RA) is a commonly occurring systemic inflammatory auto immune disease and is believed to be associated with genetic factors. The innate immune complement protein Mannose binding lectin (MBL) and their MBL2 genetic variants are associated with different infectious and autoimmune diseases. METHODS: In a Brazilian cohort, we aim to associate the functional role of circulating MBL serum levels and MBL2 variants in clinically classified patients (n = 196) with rheumatoid arthritis including their relatives (n = 200) and ethnicity matched healthy controls (n = 200). MBL serum levels were measured by ELISA and functional MBL2 variants were genotyped by direct sequencing. RESULTS: The exon1+54 MBL2*B variant was significantly associated with an increased risk and the reconstructed haplotype MBL2*LYPB was associated with RA susceptibility. Circulating serum MBL levels were observed significantly lower in RA patients compared to their relatives and controls. No significant contribution of MBL levels were observed with respect to functional class, age at disease onset, disease duration and/or other clinical parameters such as nodules, secondary Sjögren syndrome, anti-CCP and rheumatoid factor. Differential distribution of serum MBL levels with functional MBL2 variants was observed in respective RA patients and their relatives. CONCLUSIONS: Our results suggest MBL levels as a possible marker for RA susceptibility in a Brazilian population.
- Published
- 2014
3. Association of L-Ficolin Levels and FCN2 Genotypes with Chronic Chagas Disease
- Author
-
Luz, Paola R., primary, Boldt, Angelica B. W., additional, Grisbach, Caroline, additional, Kun, Jürgen F. J., additional, Velavan, Thirumalaisamy P., additional, and Messias-Reason, Iara J. T., additional
- Published
- 2013
- Full Text
- View/download PDF
4. IL-4 Haplotype -590T, -34T and Intron-3 VNTR R2 Is Associated with Reduced Malaria Risk among Ancestral Indian Tribal Populations
- Author
-
Jha, Aditya Nath, primary, Singh, Vipin Kumar, additional, Kumari, Namrata, additional, Singh, Ashish, additional, Antony, Justin, additional, van Tong, Hoang, additional, Singh, Sakshi, additional, Pati, Sudhanshu S., additional, Patra, Pradeep K., additional, Singh, Rajender, additional, Toan, Nguyen L., additional, Song, Le H., additional, Assaf, Amal, additional, Messias–Reason, Iara J. T., additional, Velavan, Thirumalaisamy P., additional, Singh, Lalji, additional, and Thangaraj, Kumarasamy, additional
- Published
- 2012
- Full Text
- View/download PDF
5. Leprosy and hepatitis B coinfection in southern Brazil.
- Author
-
Leitão, Cleverson, Ueda, Denis, de Moraes Braga, Anna Carolina, Boldt, Angelica B. W., and Messias-Reason, Iara J. T.
- Published
- 2014
- Full Text
- View/download PDF
6. Association of L-Ficolin Levels and FCN2 Genotypes with Chronic Chagas Disease.
- Author
-
Luz, Paola R., Boldt, Angelica B. W., Grisbach, Caroline, Kun, Jürgen F. J., Velavan, Thirumalaisamy P., and Messias-Reason, Iara J. T.
- Subjects
CHAGAS' disease ,PROMOTERS (Genetics) ,BLOOD plasma ,LECTINS ,GENETIC polymorphisms ,PHAGOCYTOSIS ,TRYPANOSOMA cruzi - Abstract
Background: L-ficolin (encoded by FCN2) binds to acetylated sugar moieties of many pathogens, including Trypanosoma cruzi, promoting their phagocytosis and lysis by the complement system. Methods: We investigated L-ficolin levels in 160 T. cruzi infected patients with chronic Chagas disease and 71 healthy individuals, and FCN2 polymorphisms (−986 G>A, −602 G>A, and −4 A>G in the promoter and A258S in exon 8) in 243 patients, being 88 indeterminate (asymptomatic), 96 with cardiac, 23 with digestive and 33 with cardiodigestive manifestations (two were unspecified) and 305 controls (135 for A258S). Results: Patients presented lower L-ficolin plasma levels than controls (p<0.0001). Among the different groups of cardiac commitment, individuals with moderate forms had higher L-ficolin levels than the severe forms (P = 0.039). Lower L-ficolin levels were found associated with the 258S variant in the patients (P = 0.034). We found less −4A/G heterozygotes in the cardiac patients, than in the controls (OR = 0.56 [95% CI = 0.33–0.94], P = 0.034). Heterozygote −4A/G genotypes with the 258S variant and 258SS homozygotes were nevertheless more frequent among cardiodigestive patients than in controls (OR = 14.1 [95% CI = 3.5–56.8], P = 0.0001) and in indeterminate patients (OR = 3.2 [95% CI = 1.1–9.4], P = 0.037). We also found an association of the allelic frequency of the 258S variant with cardiodigestive Chagas disease compared to controls (OR = 2.24 [95% CI = 1.1–4.5], P = 0.037). Thus, decreased patient levels of L-ficolin reflect not only protein consumption due to the disease process, but also the higher frequency of the 258S variant in patients with cardiodigestive symptoms. Conclusion: The very first study on Brazilian cohort associates both L-ficolin plasma levels and FCN2 variants to Chagas disease and subsequent disease progression. The prognostic value of L-ficolin levels and the FCN2*A258S polymorphism should be further evaluated in other settings. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
7. Reliable and rapid characterization of functional FCN2 gene variants reveals diverse geographical patterns.
- Author
-
Ojurongbe, Olusola, Abou Ouf, Eman, Hoang Van Tong, Nguyen L. Toan, Le H. Song, Luz, Paola R., Messias-Reason, Iara J. T., Nurjadi, Dennis, Zanger, Philipp, Kun, J�rgen F. J., Kremsner, Peter G., and Velavan, Thirumalaisamy P.
- Subjects
GENOMES ,GENOMICS ,GENETICS ,PROTEINS ,SERUM - Abstract
Background: Ficolin-2 coded by FCN2 gene is a soluble serum protein and an innate immune recognition element of the complement system. FCN2 gene polymorphisms reveal distinct geographical patterns and are documented to alter serum ficolin levels and modulate disease susceptibility. Methods: We employed a real-time PCR based on Fluorescence Resonance Energy Transfer (FRET) method to genotype four functional SNPs including -986 G > A (#rs3124952), -602 G > A (#rs3124953), -4A > G (#rs17514136) and +6424 G > T (#rs7851696) in the ficolin-2 (FCN2) gene. We characterized the FCN2 variants in individuals representing Brazilian (n = 176), Nigerian (n = 180), Vietnamese (n = 172) and European Caucasian ethnicity (n = 165). Results: We observed that the genotype distribution of three functional SNP variants (?986 G > A, -602 G > A and -4A > G) differ significantly between the populations investigated (p < 0.0001). The SNP variants were highly linked to each other and revealed significant population patterns. Also the distribution of haplotypes revealed distinct geographical patterns (p < 0.0001). Conclusions: The observed distribution of the FCN2 functional SNP variants may likely contribute to altered serum ficolin levels and this may depend on the different disease settings in world populations. To conclude, the use of FRET based real-time PCR especially for FCN2 gene will benefit a larger scientific community who extensively depend on rapid, reliable method for FCN2 genotyping. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
8. Formulation, characterization, and in vitro/in vivo studies of capsaicin-loaded albumin nanoparticles.
- Author
-
De Freitas GBL, De Almeida DJ, Carraro E, Kerppers II, Martins GAG, Mainardes RM, Khalil NM, and Messias-Reason IJT
- Subjects
- Animals, Cattle, Male, Rats, Rats, Wistar, Capsaicin chemistry, Capsaicin pharmacokinetics, Capsaicin pharmacology, Nanocapsules chemistry, Nanocapsules therapeutic use, Serum Albumin, Bovine chemistry, Serum Albumin, Bovine pharmacokinetics, Serum Albumin, Bovine pharmacology
- Abstract
Capsaicin (CAP) is a secondary metabolite with high therapeutic potential. It displays several bioactive properties including hypolipidemic, antioxidant, anti-inflammatory and analgesic effects. However, CAP presents toxicity to healthy cells and poor pharmacokinetic profile, which is characterized by toxic metabolites and short half-life. In this study, CAP-loaded albumin nanoparticles were obtained by the desolvation-coacervation method. The preparation process was optimized by the application of a factorial design. Nanoparticles presented diameter of about 200 nm, quasi-spherical morphology, encapsulation efficiency of 98.3 ± 7.4%, and negative zeta potential. The in vitro release assay demonstrated a biphasic profile, characterized by a fast release over 12 h followed by a prolonged release rate. Nanoencapsulated CAP showed significant antioxidant activity in an in vitro assay which was concentration - and time-dependent. In addition, the in vivo study demonstrated for the first time that both free and nanoencapsulated drug reduced TNF-alpha concentrations in the absence of inflammatory stimuli model. These novel findings indicate that albumin nanoparticles are potential CAP carriers and that this new drug formulation may be useful in several conditions, including cancer, inflammation, and neuropathic pain., (Copyright © 2018 Elsevier B.V. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
9. Serum pentraxin 3 levels are negatively associated with carotid intima media thickness in non-obese rheumatoid arthritis patients.
- Author
-
Kahlow BS, Petisco R, Skare TL, Goeldner I, Nisihara RM, and Messias-Reason IJ
- Subjects
- Adult, Aged, Aged, 80 and over, Biomarkers blood, Female, Humans, Male, Middle Aged, Obesity blood, Arthritis, Rheumatoid blood, Arthritis, Rheumatoid diagnosis, C-Reactive Protein metabolism, Carotid Intima-Media Thickness trends, Obesity diagnosis, Serum Amyloid P-Component metabolism
- Abstract
Background: Pentraxin-3 (PTX3) is a long pentraxin that is supposed to participate in the inflammatory process and in atherosclerosis., Aim: To study PTX3 serum levels in rheumatoid arthritis (RA) patients to know if its serum levels may reflect disease activity and/or subclinical atherosclerosis., Methods: PTX3 and carotid intima media thickness (IMT) were studied in 85 RA patients (83.5% females, median age of 59years old, median disease duration of 13years) along with its demographic, clinical, serological and lipid profile. For comparison PTX3 was measured in 85 healthy volunteers., Results: PTX3 levels in RA patients were similar to controls (p=0.21) and did not correlate with inflammatory activity measured by ESR (p=0.39) CRP (p=0.18) and DAS28 (p=0.67). Serum PTX3 levels were higher in nonobese RA patients than in obese (BMI vs PTX3 with rho=-0.27; 95%IC=-0.46 to -0.06; p=0.009). In non-obese patients, PTX3 correlated negatively with carotid IMT (rho=-0.40; 95%IC=-0.66 to -0.06; p=0.01) but not in the obese ones (p=0.26). In the obese RA patients there was a negative correlation between PTX3 levels and LDL/HDL ratio (Rho=-0.29; 95%IC=-0.53-0.01; p=0.03)., Conclusions: PTX3 levels do not reflect inflammatory process in RA. However, it exerts a protective role in the process of atherogenesis in non-obese RA patients., (Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2016
- Full Text
- View/download PDF
10. Association of IP-10 and PDGF-BB levels with clinical forms of chronic Chagas disease.
- Author
-
Luz PR, Velavan TP, Kremsner PG, and Messias-Reason IJ
- Subjects
- Aged, Becaplermin, Biomarkers blood, Chronic Disease, Female, Humans, Male, Middle Aged, Chagas Disease blood, Chagas Disease diagnosis, Chemokine CXCL10 blood, Proto-Oncogene Proteins c-sis blood
- Published
- 2013
- Full Text
- View/download PDF
11. Relevance of the lectin pathway of complement in rheumatic diseases.
- Author
-
Boldt AB, Goeldner I, and de Messias-Reason IJ
- Subjects
- Arthritis, Rheumatoid immunology, Arthritis, Rheumatoid physiopathology, Complement System Proteins immunology, Complement System Proteins metabolism, Humans, Lupus Erythematosus, Systemic immunology, Lupus Erythematosus, Systemic physiopathology, Mannose-Binding Lectins chemistry, Mannose-Binding Lectins genetics, Mannose-Binding Lectins immunology, Polymorphism, Genetic, Rheumatic Fever immunology, Rheumatic Fever physiopathology, Sjogren's Syndrome immunology, Sjogren's Syndrome physiopathology, Arthritis, Rheumatoid metabolism, Complement Pathway, Mannose-Binding Lectin immunology, Lupus Erythematosus, Systemic metabolism, Mannose-Binding Lectins metabolism, Rheumatic Fever metabolism, Sjogren's Syndrome metabolism
- Abstract
Due to its importance both in the clearance of pathogens that contribute as rheumatic etiological agents and in the disposal of apoptotic bodies and potential autoimmune initiators, deficiencies of the components of the lectin pathway of complement have been found to increase susceptibility and modulate the severity of most rheumatic disorders. This chapter introduces the general aspects of the structure, function, and genetics of lectin pathway components and summarizes current knowledge of the field regarding rheumatic diseases predisposition and modulation.
- Published
- 2012
- Full Text
- View/download PDF
12. MASP2 haplotypes are associated with high risk of cardiomyopathy in chronic Chagas disease.
- Author
-
Boldt AB, Luz PR, and Messias-Reason IJ
- Subjects
- Adult, Aged, Chronic Disease, Female, Genotype, Haplotypes, Humans, Male, Middle Aged, Polymerase Chain Reaction, Polymorphism, Genetic, Risk Factors, Chagas Cardiomyopathy genetics, Genetic Predisposition to Disease genetics, Mannose-Binding Protein-Associated Serine Proteases genetics
- Abstract
Mannose-binding lectin (MBL) initiates complement on Trypanosoma cruzi through the MBL-associated serine protease 2 (MASP2). We haplotyped six MASP2 polymorphisms in 208 chronic chagasic patients, being 81 indeterminate and 123 symptomatic (76 with cardiac, 19 with digestive and 28 with cardiodigestive forms) and 300 healthy individuals from Southern Brazil, using PCR with sequence-specific primers. The g.1961795C, p.371D diplotype (short CD) occurred at a higher frequency among symptomatic patients, compared with the indeterminate group (P(Bf)=0.012, OR=3.11), as well as genotypes with CD, but not with the g.1945560A in the promoter in cardiac patients (P(Bf)=0.012, OR=13.54). CD haplotypes linked to the p.P126L and p.V377A variants were associated with reduced MASP-2 levels (P<0.0001) but not reduced MBL/MASP-2/C4 complexes. MASP2*CD genotypes, most of them generating low MASP-2 levels, are associated with high risk of chagasic cardiomyopathy. Rapid MASP2 genotyping might be used to predict the risk of symptomatic disease., (Copyright © 2011 Elsevier Inc. All rights reserved.)
- Published
- 2011
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.