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Angelov AK, Markov M, Ivanova M, Georgiev T. The genesis of cardiovascular risk in inflammatory arthritis: insights into glycocalyx shedding, endothelial dysfunction, and atherosclerosis initiation. Clin Rheumatol 2023; 42:2541-2555. [PMID: 37581758 DOI: 10.1007/s10067-023-06738-x] [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: 07/18/2023] [Revised: 08/05/2023] [Accepted: 08/07/2023] [Indexed: 08/16/2023]
Abstract
This narrative review provides a comprehensive examination of the complex interplay between inflammatory arthritis (IA) and cardiovascular pathology. It particularly illuminates the roles of atherosclerosis initiation, endothelial dysfunction, and glycocalyx shedding. IA not only provokes tissue-specific inflammatory responses, but also engenders a considerable degree of non-specific systemic inflammation. This review underscores the accelerating influence of the chronic inflammatory milieu of IA on cardiovascular disease (CVD) progression. A focal point of our exploration is the critical function of the endothelial glycocalyx (EG) in this acceleration process, which possibly characterizes the earliest phases of atherosclerosis. We delve into the influence of inflammatory mediators on microtubule dynamics, EG modulation, immune cell migration and activation, and lipid dysregulation. We also illuminate the impact of microparticles and microRNA on endothelial function. Further, we elucidate the role of systemic inflammation and sheddases in EG degradation, the repercussions of complement activation, and the essential role of syndecans in preserving EG integrity. Our review provides insight into the complex and dynamic interface between systemic circulation and the endothelium.
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Affiliation(s)
- Alexander Krasimirov Angelov
- Medical Faculty, Medical University - Sofia, Sofia, 1431, Bulgaria
- Clinic of Rheumatology, University Hospital St. Ivan Rilski - Sofia, Sofia, 1431, Bulgaria
| | - Miroslav Markov
- Faculty of Medicine, Medical University - Varna, Varna, 9002, Bulgaria
- Clinic of Internal Medicine, University Hospital St. Marina - Varna, Varna, 9010, Bulgaria
| | - Mariana Ivanova
- Medical Faculty, Medical University - Sofia, Sofia, 1431, Bulgaria
- Clinic of Rheumatology, University Hospital St. Ivan Rilski - Sofia, Sofia, 1431, Bulgaria
| | - Tsvetoslav Georgiev
- Faculty of Medicine, Medical University - Varna, Varna, 9002, Bulgaria.
- Clinic of Rheumatology, University Hospital St. Marina - Varna, Varna, 9002, Bulgaria.
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Ceballos FC, Chamizo-Carmona E, Mata-Martín C, Carrasco-Cubero C, Aznar-Sánchez JJ, Veroz-González R, Rojas-Herrera S, Dorado P, LLerena A. Pharmacogenetic Sex-Specific Effects of Methotrexate Response in Patients with Rheumatoid Arthritis. Pharmaceutics 2023; 15:1661. [PMID: 37376109 DOI: 10.3390/pharmaceutics15061661] [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: 03/15/2023] [Revised: 05/09/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
Methotrexate (MTX) is a commonly used drug for the treatment of rheumatoid arthritis (RA), but its effectiveness can vary greatly among patients. Pharmacogenetics, the study of how genetic variations can affect drug response, has the potential to improve the personalized treatment of RA by identifying genetic markers that can predict a patient's response to MTX. However, the field of MTX pharmacogenetics is still in its early stages and there is a lack of consistency among studies. This study aimed to identify genetic markers associated with MTX efficacy and toxicity in a large sample of RA patients, and to investigate the role of clinical covariates and sex-specific effects. Our results have identified an association of ITPA rs1127354 and ABCB1 rs1045642 with response to MTX, polymorphisms of FPGS rs1544105, GGH rs1800909, and MTHFR genes with disease remission, GGH rs1800909 and MTHFR rs1801131 polymorphisms with all adverse events, and ADA rs244076 and MTHFR rs1801131 and rs1801133, However, clinical covariates were more important factors to consider when building predictive models. These findings highlight the potential of pharmacogenetics to improve personalized treatment of RA, but also emphasize the need for further research to fully understand the complex mechanisms involved.
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Affiliation(s)
| | | | - Carmen Mata-Martín
- MEPER Group-Clinical and Translational Research in Pharmacogenetics and Personalized Medicine, Biosanitary Research Institute of Extremadura (INUBE), 06080 Badajoz, Spain
- CICAB Clinical Research Center, Pharmacogenetics and Personalized Medicine Unit, Hospital Universitario de Badajoz, 06080 Badajoz, Spain
| | | | | | | | | | - Pedro Dorado
- MEPER Group-Clinical and Translational Research in Pharmacogenetics and Personalized Medicine, Biosanitary Research Institute of Extremadura (INUBE), 06080 Badajoz, Spain
- Faculty of Medicine, Universidad de Extremadura, 06071 Badajoz, Spain
| | - Adrián LLerena
- MEPER Group-Clinical and Translational Research in Pharmacogenetics and Personalized Medicine, Biosanitary Research Institute of Extremadura (INUBE), 06080 Badajoz, Spain
- CICAB Clinical Research Center, Pharmacogenetics and Personalized Medicine Unit, Hospital Universitario de Badajoz, 06080 Badajoz, Spain
- Faculty of Medicine, Universidad de Extremadura, 06071 Badajoz, Spain
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Kintrilis N, Gravani F, Rapti A, Papaioannou M, Flessa CM, Nezos A, Antypa E, Papadaki I, Karageorgas Τ, Moutsopoulos HM, Mavragani CP. Subclinical atherosclerosis profiles in rheumatoid arthritis and primary Sjögren's syndrome: the impact of BAFF genetic variations. Rheumatology (Oxford) 2023; 62:958-968. [PMID: 35689637 DOI: 10.1093/rheumatology/keac337] [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: 02/01/2022] [Revised: 05/16/2022] [Accepted: 05/16/2022] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES RA and primary SS carry increased atherosclerotic risk, while B-cell activating factor holds a vital role in disease pathogenesis and atherosclerosis. We aimed to compare subclinical atherosclerosis profiles between the two clinical entities and define whether BAFF genetic variants alter atherosclerotic risk. METHODS DNA from 166 RA, 148 primary SS patients and 200 healthy controls of similar age and sex distribution was subjected to PCR-based assay for the detection of five single nucleotide polymorphisms of the BAFF gene (rs1224141, rs12583006, rs9514828, rs1041569 and rs9514827). Genotype and haplotype frequencies were determined by SNPStats software and statistical analysis was performed by SPSS and Graphpad Software. Subclinical atherosclerosis was defined by the presence of carotid/femoral plaque formation and arterial wall thickening. RESULTS Atherosclerotic plaque formation was more frequently detected in the RA vs primary SS group (80.7% vs 62.2%, P-value <0.001), along with higher rates of family CVD history, current steroid dose and serum inflammatory markers. The TT genotype of the rs1224141 variant was more prevalent in RA but not primary SS patients with plaque and arterial wall thickening vs their counterparts without. Regarding the rs1014569 variant, among RA patients the TT genotype increased the risk for plaque formation while in primary SS patients the AT genotype conferred increased risk. Haplotype GTTTT was protective in the RA cohort, while TATTT and TTCTT haplotypes increased susceptibility for arterial wall thickening in the primary SS cohort. CONCLUSIONS Increased inflammatory burden, higher steroid doses and distinct BAFF gene variations imply chronic inflammation and B-cell hyperactivity as key contributors for the augmented atherosclerotic risk among autoimmune patients.
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Affiliation(s)
- Nikolaos Kintrilis
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens
| | | | - Anna Rapti
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens.,Department of Rheumatology
| | - Myrto Papaioannou
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens
| | - Christina-Maria Flessa
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens
| | - Adrianos Nezos
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens
| | - Eleni Antypa
- Department of Radiology, G. Gennimatas General Hospital of Athens
| | | | - Τheofanis Karageorgas
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens
| | | | - Clio P Mavragani
- Department of Physiology, School of Medicine, National and Kapodistrian University of Athens.,Joint Academic Rheumatology Program, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
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Yamada K, Mendoza J, Koutmos M. 5-Formyltetrahydrofolate promotes conformational remodeling in a methylenetetrahydrofolate reductase active site and inhibits its activity. J Biol Chem 2023; 299:102855. [PMID: 36592927 PMCID: PMC9900621 DOI: 10.1016/j.jbc.2022.102855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 12/24/2022] [Accepted: 12/27/2022] [Indexed: 01/01/2023] Open
Abstract
The flavoprotein methylenetetrahydrofolate reductase (MTHFR) catalyzes the reduction of N5, N10-methylenetetrahydrofolate (CH2-H4folate) to N5-methyltetrahydrofolate (CH3-H4folate), committing a methyl group from the folate cycle to the methionine one. This committed step is the sum of multiple ping-pong electron transfers involving multiple substrates, intermediates, and products all sharing the same active site. Insight into folate substrate binding is needed to better understand this multifunctional active site. Here, we performed activity assays with Thermus thermophilus MTHFR (tMTHFR), which showed pH-dependent inhibition by the substrate analog, N5-formyltetrahydrofolate (CHO-H4folate). Our crystal structure of a tMTHFR•CHO-H4folate complex revealed a unique folate-binding mode; tMTHFR subtly rearranges its active site to form a distinct folate-binding environment. Formation of a novel binding pocket for the CHO-H4folate p-aminobenzoic acid moiety directly affects how bent the folate ligand is and its accommodation in the active site. Comparative analysis of the available active (FAD- and folate-bound) MTHFR complex structures reveals that CHO-H4folate is accommodated in the active site in a conformation that would not support hydride transfer, but rather in a conformation that potentially reports on a different step in the reaction mechanism after this committed step, such as CH2-H4folate ring-opening. This active site remodeling provides insights into the functional relevance of the differential folate-binding modes and their potential roles in the catalytic cycle. The conformational flexibility displayed by tMTHFR demonstrates how a shared active site can use a few amino acid residues in lieu of extra domains to accommodate chemically distinct moieties and functionalities.
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Affiliation(s)
- Kazuhiro Yamada
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA; Program in Biophysics, University of Michigan, Ann Arbor, Michigan, USA.
| | - Johnny Mendoza
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Markos Koutmos
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA; Program in Biophysics, University of Michigan, Ann Arbor, Michigan, USA; Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan, USA.
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Folate in maternal rheumatoid arthritis-filial autism spectrum disorder continuum. Reprod Toxicol 2023; 115:29-35. [PMID: 36402436 DOI: 10.1016/j.reprotox.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Rheumatoid Arthritis (RA) is an inflammatory autoimmune disease that affects women three times more than men. Epidemiological studies found that the incidence of Autism Spectrum Disorder (ASD), a neurological and developmental disorder, in children born to mothers suffering from RA is higher compared with the control population. Considering that the pathogenesis of ASD could be traced back to pregnancy and in uterine conditions, and the evidence of reduced folate levels in the brain of ASD-affected children, we aimed to study the role of folate, as an important nutritional factor during pregnancy, in associating maternal RA to ASD development in the offspring. Folate balance during RA could be influenced twice, initially during the immune activation associated with disease onset, and later during the treatment with anti-folate drugs, with a potential consequence of folate deficiency. Maternal folate deficiency during pregnancy could increase homocysteine levels, oxidative stress, and global DNA hypomethylation, all known risk factors in ASD pathogenesis. These effects could be intensified by genetic polymorphisms in the folate system, which were also found as genetic risk factors for both RA and ASD. The available evidence suggests that folate level as an important factor during RA, pregnancy and ASD could have pathological and therapeutical significance and should be carefully monitored and investigated in the RA-pregnancy-ASD axis.
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