Oligomerization and tyrosine nitration enhance the allergenic potential of the birch and grass pollen allergens Bet v 1 and Phl p 5 DOI Creative Commons
Janine Fröhlich‐Nowoisky,

Nadine Bothen,

Anna T. Backes

et al.

Frontiers in Allergy, Journal Year: 2023, Volume and Issue: 4

Published: Dec. 5, 2023

Protein modifications such as oligomerization and tyrosine nitration alter the immune response to allergens may contribute increasing prevalence of allergic diseases. In this mini-review, we summarize discuss relevant findings for major birch grass pollen Bet v 1 Phl p 5 modified with tetranitromethane (laboratory studies), peroxynitrite (physiological processes), ozone nitrogen dioxide (environmental conditions). We focus on formation protein dimers higher oligomers via dityrosine cross-linking immunological effects studied.

Language: Английский

Tyrosine – a structural glue for hierarchical protein assembly DOI
Anton Maraldo, Jelena Rnjak‐Kovacina, Christopher P. Marquis

et al.

Trends in Biochemical Sciences, Journal Year: 2024, Volume and Issue: 49(7), P. 633 - 648

Published: April 22, 2024

Language: Английский

Citations

8
A comparative study on the antioxidant and antiglycation properties of different vitamin D forms DOI Creative Commons
Cezary Pawlukianiec, Kamil Klaudiusz Lauko, Daniel Michalak

et al.

European Journal of Medicinal Chemistry, Journal Year: 2025, Volume and Issue: 285, P. 117263 - 117263

Published: Jan. 10, 2025

Language: Английский

Citations

0
Fibrinogen Oxidation and Thrombosis: Shaping Structure and Function DOI Creative Commons
Francesca Nencini,

Elvira Giurranna,

Serena Borghi

et al.

Antioxidants, Journal Year: 2025, Volume and Issue: 14(4), P. 390 - 390

Published: March 26, 2025

Fibrinogen, a pivotal plasma glycoprotein, plays an essential role in hemostasis by serving as the precursor to fibrin, which forms structural framework of blood clots. Beyond coagulation, fibrinogen influences immune responses, inflammation, and tissue repair. Oxidative stress, characterized imbalance between reactive oxygen species (ROS) antioxidants, induces oxidation, significantly altering its structure function. This narrative review synthesizes findings from vitro, ex vivo, clinical studies, emphasizing impact oxidation on clot formation, architecture, degradation. modifications result denser fibrin clots with thinner fibers, reduced permeability, heightened resistance fibrinolysis. These changes exacerbate prothrombotic conditions cardiovascular diseases, diabetes, chronic inflammatory disorders cancer. In contrast, “low-dose” oxidative stress may elicit protective adaptations fibrinogen, preserving The also highlights discrepancies experimental due variability protocols patient conditions. Understanding interplay function could unveil therapeutic strategies targeting stress. Antioxidant therapies or selective inhibitors detrimental hold potential for mitigating thrombotic risks. However, further research is pinpoint specific sites, clarify their roles dynamics, bridge gap basic practice.

Language: Английский

Citations

0
Intramolecular Histidine Cross-Links Formed via Copper-Catalyzed Oxidation of Histatin Peptides DOI

Leah J. Bontreger,

Annastassia D. Gallo,

Jaewon Moon

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Histidine is a versatile amino acid with metal-binding, nucleophilic, and basic properties that endow many peptides proteins biological activity. However, histidine itself susceptible to oxidative modifications via post-translational modifications, photo-oxidation, metal-catalyzed oxidation. Despite multiple investigations into these different oxidation systems, the varied attributions differential outcomes point significant gaps in our understanding of coordination requirements, spectral features, reaction products accompany Cu-catalyzed histidine-containing peptides. Here, we use model Histatin-5, salivary peptide Cu-potentiated antifungal activity relies on its residues, characterize complex mixture resulting from Cu under physiologically relevant reducing oxidizing conditions. Characterization LC-MS, MS/MS, UV-vis, NMR revealed adjacent residues bis-His site are main target oxidation, predominant being 2-oxo-His His-His cross-links give rise distinctive electronic absorption features between 300-400 nm. Doubly- triply-oxygenated peptides, intramolecular cross-links, multimers case shorter were also observed. The configuration motif may enable reactivity not available systems where His sequence or space. These results expand possibilities other containing histidines.

Language: Английский

Citations

0
Exploring the Role of microRNAs as Blood Biomarkers in Alzheimer’s Disease and Frontotemporal Dementia DOI Open Access
Irene Petracci, Sonia Bellini, Katarzyna Goljanek‐Whysall

et al.

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(7), P. 3399 - 3399

Published: April 5, 2025

Alzheimer's disease (AD) and frontotemporal dementia (FTD) are the most common forms of globally. AD is characterized by accumulation amyloid-β (Aβ) plaques hyperphosphorylated tau in brain, leading to progressive memory loss cognitive decline, significantly impairing daily life. In contrast, FTD marked selective degeneration frontal and/or temporal lobes, typically resulting profound changes personality social behavior, speech disorders, psychiatric symptoms. Numerous studies have found microRNAs (miRNAs)-small, non-coding RNA molecules that regulate gene expression post-transcriptionally-to be dysregulated FTD. As a result, miRNAs emerged as promising novel biomarkers for these diseases. This review examines current understanding FTD, emphasizing their potential accessible, noninvasive diagnosing prevalent neurodegenerative disorders.

Language: Английский

Citations

0
Stabilization and Reduced Cytotoxicity of Amyloid Beta Aggregates in the Presence of Catechol Neurotransmitters DOI
Mary Alice Allnutt,

Kathryn Mansfield Matera

Neurochemical Research, Journal Year: 2023, Volume and Issue: 49(2), P. 379 - 387

Published: Oct. 17, 2023

Language: Английский

Citations

2
Local photo-crosslinking of native tissue matrix regulates cell function DOI Creative Commons
Donia W Ahmed,

Matthew L. Tan,

Jackson Gabbard

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 10, 2024

Abstract Within most tissues, the extracellular microenvironment provides mechanical cues that guide cell fate and function. Changes in matrix such as aberrant deposition, densification increased crosslinking are hallmarks of late-stage fibrotic diseases often lead to organ dysfunction. Biomaterials have been widely used mimic properties study However, initiation fibrosis has largely overlooked, due challenges recapitulating early lesions within native microenvironment. Using visible light mediated photochemistry, we induced local stiffening proteins ex vivo murine human tissue. In lung tissue epithelial lineage-traced mice, mimicked alveolar spreading, differentiation remodeling. inhibition cytoskeletal tension or integrin engagement reduced spreading differentiation, resulting dedifferentiation deposition. Our findings emphasize role remodeling early-stage implications for disease modeling applications other tissues.

Language: Английский

Citations

0
The importance of oxidative stress in the pathogenesis and treatment of bipolar affective disorder: a review of the literature DOI Open Access

Łukasz Łobejko,

Michalina Hordejuk, Joanna Róg

et al.

Current Problems of Psychiatry, Journal Year: 2024, Volume and Issue: 25, P. 186 - 202

Published: Sept. 24, 2024

Introduction: Bipolar affective disorder (BD), also known as manic-depressive illness, is a chronic and recurrent psychiatric characterised by significant mood disturbances. It one of the leading causes disability worldwide associated with high risk suicide. Recent studies highlight role oxidative stress (OS) in pathogenesis BD. The body's pro/antioxidant imbalance adversely affects cellular molecular processes. Aim: aim this review to synthesise current state knowledge on OS aetiology course BD, including key biomarkers potential therapeutic interventions. Methods: A scientific literature was conducted, articles published between 2000 2024. Searches were conducted PubMed, Scopus Web Science databases, using following keywords: 'bipolar disorder', 'oxidative stress', 'antioxidants', 'biomarkers', 'mitochondrial dysfunction', 'redox homeostasis', 'treatment'. Results: Results indicate that patients BD have elevated levels markers, increased lipid peroxidation, altered antioxidant enzyme activity impaired redox homeostasis. Treatment lithium other stabilisers may modulate which mechanism drug action. However, inconclusive data suggest need for further research clarify relationship Conclusions: plays an important pathophysiology offering directions Understanding complex interactions lead development more targeted therapies aimed at reducing damage improving patient health. Keywords: stress, bipolar disorder, redox, protein damage, antioxidants,

Language: Английский

Citations

0
Nitroxyl Hybrids with Curcumin and Stilbene Scaffolds Display Potent Antioxidant Activity, Remodel the Amyloid Beta Oligomer, and Reverse Amyloid Beta-Induced Cytotoxicity DOI Creative Commons

Madhu S. Budamagunta,

Hidetoshi Mori,

Joshua Silk

et al.

Antioxidants, Journal Year: 2024, Volume and Issue: 13(11), P. 1411 - 1411

Published: Nov. 18, 2024

The disorder and heterogeneity of low-molecular-weight amyloid-beta oligomers (AβOs) underlie their participation in multiple modes cellular dysfunction associated with the etiology Alzheimer's disease (AD). lack specified conformational states these species complicates efforts to select or design small molecules targeting discrete pathogenic states. Furthermore, AβOs alone may be therapeutically insufficient, as AD progresses a multifactorial, self-amplifying cascade. To address challenges, we have screened activity seven new candidates that serve Paramagnetic Amyloid Ligand (PAL) candidates. PALs are bifunctional both remodel AβO structure localize potent antioxidant mimics SOD within live cells. built from either stilbene curcumin scaffold nitroxyl moiety catalytic antioxidants. Measurements PAL binding remolding along assessments bioactivity allow for extraction useful SAR information screening data. One candidate (HO-4450; PMT-307), six-membered ring attached ring, displays highest potency protecting against cell-derived Aβ. A preliminary low-dose evaluation model mice provides evidence modest treatment effects by HO-4450. results demonstrate retention native phenolic groups is advantageous hybrid Finally, remodeling secondary structures shows reasonable correlation between candidate's its ability reduce fraction antiparallel β-strand.

Language: Английский

Citations

0
Oligomerization and tyrosine nitration enhance the allergenic potential of the birch and grass pollen allergens Bet v 1 and Phl p 5 DOI Creative Commons
Janine Fröhlich‐Nowoisky,

Nadine Bothen,

Anna T. Backes

et al.

Frontiers in Allergy, Journal Year: 2023, Volume and Issue: 4

Published: Dec. 5, 2023

Protein modifications such as oligomerization and tyrosine nitration alter the immune response to allergens may contribute increasing prevalence of allergic diseases. In this mini-review, we summarize discuss relevant findings for major birch grass pollen Bet v 1 Phl p 5 modified with tetranitromethane (laboratory studies), peroxynitrite (physiological processes), ozone nitrogen dioxide (environmental conditions). We focus on formation protein dimers higher oligomers via dityrosine cross-linking immunological effects studied.

Language: Английский

Citations

1