Numerical simulation and mathematical modeling of biomechanical stress distribution in poroelastic tumor tissue via magnetic field and bio-ferro-fluid DOI Creative Commons

Mahdi Halabian,

Borhan Beigzadeh, Majid Siavashi

et al.

Heliyon, Journal Year: 2024, Volume and Issue: 10(14), P. e34651 - e34651

Published: July 1, 2024

Based on scientific evidence, it seems that bio-magnetic systems can change the process of cancer cell death by affecting distribution pressure and mechanical stress in tumor tissue. Already most research has been done experimentally few mathematical modeling numerical simulations have to investigate relationship between magnetic parameters This is despite fact order be able make new equipment with help medical engineering methods, definitely necessary mathematics governing problem changes effective (such as shape source, flux density, source distance ferro-fluid volume fraction) should studied much possible. In this research, using simulation modeling, four common geometrical shapes (rectangular circular) static field were used created The results showed when density fraction also magnet tissue are kept constant, well without spending any extra energy, for a rectangular magnet, just changing way placed tissue, average biomechanical inside causes 25 % change. Also, circular doubling radius 73

Language: Английский

The endothelial surface layer-glycocalyx - Universal nano-infrastructure is fundamental to physiology, cell traffic and a complementary neural network DOI Creative Commons
Barry W. Ninham, N. F. Bunkin, Matthew Battye

et al.

Advances in Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 338, P. 103401 - 103401

Published: Jan. 18, 2025

Language: Английский

Citations

0

Impact of aging on anterior segment morphology and aqueous humor dynamics in human Eyes: Advanced imaging and computational techniques DOI
Alireza Karimi, Marie Darche, Ansel Stanik

et al.

Journal of Applied Biomedicine, Journal Year: 2025, Volume and Issue: 45(1), P. 62 - 73

Published: Jan. 1, 2025

Language: Английский

Citations

0

Identification and Validation of Key Biomarkers in the Proximal Aqueous Humor Outflow Pathway DOI Creative Commons
Rong Du,

Enzhi Yang,

Madison Clark

et al.

Current Issues in Molecular Biology, Journal Year: 2025, Volume and Issue: 47(3), P. 147 - 147

Published: Feb. 25, 2025

Glaucoma is a leading cause of irreversible blindness, with elevated intraocular pressure (IOP) as the most important risk factor. The trabecular meshwork (TM) and Schlemm’s canal are main components proximal aqueous humor outflow pathway. Their dysfunction major contributor to IOP elevation. This study aims identify validate key biomarkers for TM endothelial (SCE) cells. A Microarray was performed on characterized human SCE cells analyze their transcriptome profiling. Differentially expressed genes (DEGs) were identified cross-referenced published single-cell RNA sequencing (scRNA-Seq) datasets ensure cell-specific relevance. Further validation using qPCR re-confirmed scRNA-seq datasets. One-way ANOVA used statistical analysis, p < 0.05 considered significant. revealed 341 DEGs, enriched in metabolic signaling pathways adhesion, immune, morphogenesis-related processes. Cross-referencing scRNA-Seq data refined list candidate biomarkers, confirmed significant gene expression differences between CTTNBP2 MGARP cell markers. JAM2, PODXL, IFI27 new biomarkers. validated offer insights into glaucoma pathophysiology lay groundwork targeted therapies.

Language: Английский

Citations

0

Effects of Brimonidine, Latanoprost, and Omidenepag on Tunicamycin-Induced Endoplasmic Reticulum Stress and Fibrosis in Human Trabecular Meshwork Cells DOI Creative Commons

Mengxuan Liu,

Megumi Honjo, Reiko Yamagishi

et al.

Biomolecules, Journal Year: 2025, Volume and Issue: 15(3), P. 389 - 389

Published: March 8, 2025

This study evaluated the effects of α2-adrenergic agonist, prostaglandin F2α analog, and EP2 receptor agonist on tunicamycin-induced endoplasmic reticulum (ER) stress fibrosis in human trabecular meshwork (TM) cells. Human TM cells were treated with tunicamycin for 24 h, followed by cotreatment brimonidine (BRI), latanoprost (LAT), or omidenepag (OMD). Immunocytochemistry was used to assess expressions collagen type I alpha 1 chain (COL1A1), fibronectin, F-actin, alpha-smooth muscle actin (α-SMA). Western blotting performed evaluate levels C/EBP homologous protein (CHOP), 78-kDa glucose-regulated (GRP78), splicing X-box binding protein-1 (sXBP-1). Real-time qPCR examine mRNA COL1A1, connective tissue growth factor (CTGF), α-SMA, CHOP, GRP78, sXBP-1. Expressions CTGF, sXBP-1 significantly increased after treatment. BRI downregulated LAT OMD reduced CHOP compared tunicamycin-treated group. BRI, LAT, attenuated cellular cytoskeletal changes increase markers such as α-SMA. In addition, COL1A1 expression lowered BRI-cotreated Cotreatment alleviates ER

Language: Английский

Citations

0

Matrix stiffness regulates traction forces, cytoskeletal dynamics, and collagen reorganization in trabecular meshwork cells in glaucoma DOI
Alireza Karimi, Mini Aga, Ansel Stanik

et al.

Matter, Journal Year: 2025, Volume and Issue: unknown, P. 102094 - 102094

Published: April 1, 2025

Language: Английский

Citations

0

Comparative analysis of traction forces in normal and glaucomatous trabecular meshwork cells within a 3D, active fluid-structure interaction culture environment DOI
Alireza Karimi, Mini Aga,

Taaha Khan

et al.

Acta Biomaterialia, Journal Year: 2024, Volume and Issue: 180, P. 206 - 229

Published: April 17, 2024

Language: Английский

Citations

2

Biomechanics of the JCT and SC Inner Wall Endothelial Cells with Their Basement Membrane Using 3D Serial Block-Face Scanning Electron Microscopy DOI Creative Commons
Alireza Karimi, Reza Razaghi,

Mary J. Kelley

et al.

Bioengineering, Journal Year: 2023, Volume and Issue: 10(9), P. 1038 - 1038

Published: Sept. 4, 2023

Background: More than ~70% of the aqueous humor exits eye through conventional outflow pathway that is comprised trabecular meshwork (TM), juxtacanalicular tissue (JCT), inner wall endothelium Schlemm’s canal (SC). The flow resistance in JCT and SC basement membrane thought to play an important role regulation intraocular pressure (IOP) eye, but current imaging techniques do not provide enough information about mechanics these tissues or this area. Methods: A normal human was perfusion-fixed a radial wedge TM from high-flow region dissected. were then sliced imaged using serial block-face scanning electron microscopy. Slices images selected segmented create 3D finite element model cells with membrane. used replace intertrabecular spaces, pores, giant vacuoles, fluid–structure interaction employed couple motion humor. Results: Higher tensile stresses (0.8-kPa) strains (25%) observed beneath vacuoles open pores. volumetric average shear stress higher JCT/SC. As approached SC, velocity decreased, resulting formation small eddies immediately after left wall. Conclusions: Improved modeling can enhance our understanding funneling. Serial microscopy achieve this, micro-segmental patterns ex vivo perfused eyes suggest hypothetical mechanism.

Language: Английский

Citations

5

Implementing new computational methods for the study of JCT and SC inner wall basement membrane biomechanics and hydrodynamics DOI Creative Commons
Alireza Karimi, Reza Razaghi,

Siddharth Daniel D'costa

et al.

Computer Methods and Programs in Biomedicine, Journal Year: 2023, Volume and Issue: 243, P. 107909 - 107909

Published: Oct. 31, 2023

Language: Английский

Citations

5

Role of endothelial glycocalyx in central nervous system diseases and evaluation of the targeted therapeutic strategies for its protection: a review of clinical and experimental data DOI

Weihao Ye,

Shang Xu,

Ying Liu

et al.

Reviews in the Neurosciences, Journal Year: 2024, Volume and Issue: 35(8), P. 839 - 853

Published: July 22, 2024

Abstract Central nervous system (CNS) diseases, such as stroke, traumatic brain injury, dementia, and demyelinating are generally characterized by high morbidity mortality, which impose a heavy economic burden on patients their caregivers throughout lives well public health. The occurrence development of CNS diseases closely associated with series pathophysiological changes including inflammation, blood–brain barrier disruption, abnormal coagulation. Endothelial glycocalyx (EG) plays key role in these changes, making it novel intervention target for diseases. Herein, we review the current understanding EG common from perspective individual pathways/cytokines systematic processes. Furthermore, emphasize recent developments therapeutic agents targeted toward protection or restoration EG. Some treatments have yielded unexpected pharmacological results, previously unknown mechanisms underlying degradation destruction has been brought to light. anti-inflammatory, anticoagulative, antioxidation effects its protective exerted via recognized.

Language: Английский

Citations

1

High-Resolution Modeling of Aqueous Humor Dynamics in the Conventional Outflow Pathway of a Normal Human Donor Eye DOI
Alireza Karimi, Reza Razaghi, Ansel Stanik

et al.

Computer Methods and Programs in Biomedicine, Journal Year: 2024, Volume and Issue: 260, P. 108538 - 108538

Published: Nov. 29, 2024

Language: Английский

Citations

1